Факториал числа 665
!
665! = 1517465550811984224310544606801616293930303901387605722733364575611732435591136671154959169371608126187672375681017307866876432518214308262514327963723972757400511503799246204820845088137232998324838608873113795016178533773857740634952465107932825674814541958944687226923994461137566926503793428408993456164280504606017857458683573298521568483226229223345511089494981941868776039156297509844486049167184835733978210919678602210161752659026974565893707649160158418138478117242279131386032704415664409930537656325491915494168473449763063062296136853982983612307436160193469161056655081890654868417153113658805612016935089072502565849061666419942407974243454308962958056719841461086337903392751200382051827691927931141974685381826262765617775397411006836283655509414015072823970181007723187441634554511612833855985127813603094484667358365137341165543863925901650987735348274166407127966516360982115156533424992787796647891189532772851924333508969974643606774116114975230049490585152825816672488613204777355052200491854375753947507932788234118054571256719255342593646294007610427293180890366335492219328300621034009157281335977563004810497395440939436481685052852795855918234892207698514229703008030718612752371316170512413527738609795994147230948188793092595778580889371929970737695568634829491710530562376251615730625000320502504457714708743653398001643694338539199195083212584374078588379197685696132064912811410517731838001152000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
665! = 1×2×3×4×5×6×7×8×9×10×11×12×13×14×15×16×17×18×19×20×21×22×23×24×25×26×27×28×29×30×31×32×33×34×35×36×37×38×39×40×41×42×43×44×45×46×47×48×49×50×51×52×53×54×55×56×57×58×59×60×61×62×63×64×65×66×67×68×69×70×71×72×73×74×75×76×77×78×79×80×81×82×83×84×85×86×87×88×89×90×91×92×93×94×95×96×97×98×99×100×101×102×103×104×105×106×107×108×109×110×111×112×113×114×115×116×117×118×119×120×121×122×123×124×125×126×127×128×129×130×131×132×133×134×135×136×137×138×139×140×141×142×143×144×145×146×147×148×149×150×151×152×153×154×155×156×157×158×159×160×161×162×163×164×165×166×167×168×169×170×171×172×173×174×175×176×177×178×179×180×181×182×183×184×185×186×187×188×189×190×191×192×193×194×195×196×197×198×199×200×201×202×203×204×205×206×207×208×209×210×211×212×213×214×215×216×217×218×219×220×221×222×223×224×225×226×227×228×229×230×231×232×233×234×235×236×237×238×239×240×241×242×243×244×245×246×247×248×249×250×251×252×253×254×255×256×257×258×259×260×261×262×263×264×265×266×267×268×269×270×271×272×273×274×275×276×277×278×279×280×281×282×283×284×285×286×287×288×289×290×291×292×293×294×295×296×297×298×299×300×301×302×303×304×305×306×307×308×309×310×311×312×313×314×315×316×317×318×319×320×321×322×323×324×325×326×327×328×329×330×331×332×333×334×335×336×337×338×339×340×341×342×343×344×345×346×347×348×349×350×351×352×353×354×355×356×357×358×359×360×361×362×363×364×365×366×367×368×369×370×371×372×373×374×375×376×377×378×379×380×381×382×383×384×385×386×387×388×389×390×391×392×393×394×395×396×397×398×399×400×401×402×403×404×405×406×407×408×409×410×411×412×413×414×415×416×417×418×419×420×421×422×423×424×425×426×427×428×429×430×431×432×433×434×435×436×437×438×439×440×441×442×443×444×445×446×447×448×449×450×451×452×453×454×455×456×457×458×459×460×461×462×463×464×465×466×467×468×469×470×471×472×473×474×475×476×477×478×479×480×481×482×483×484×485×486×487×488×489×490×491×492×493×494×495×496×497×498×499×500×501×502×503×504×505×506×507×508×509×510×511×512×513×514×515×516×517×518×519×520×521×522×523×524×525×526×527×528×529×530×531×532×533×534×535×536×537×538×539×540×541×542×543×544×545×546×547×548×549×550×551×552×553×554×555×556×557×558×559×560×561×562×563×564×565×566×567×568×569×570×571×572×573×574×575×576×577×578×579×580×581×582×583×584×585×586×587×588×589×590×591×592×593×594×595×596×597×598×599×600×601×602×603×604×605×606×607×608×609×610×611×612×613×614×615×616×617×618×619×620×621×622×623×624×625×626×627×628×629×630×631×632×633×634×635×636×637×638×639×640×641×642×643×644×645×646×647×648×649×650×651×652×653×654×655×656×657×658×659×660×661×662×663×664×665
Теория
Факториалом натурального числа n называется произведение всех натуральных чисел от 1 до n.Обозначается как n!.
n! = 1 × 2 × 3 × . . . × (n - 1) × n
Разберём пример
Найдём факториал числа 5
5! = 1 × 2 × 3 × 4 × 5 = 120