668721601968

Names of 668721601968

• Cardinal: 668721601968 can be written as Six hundred sixty-eight billion, seven hundred twenty-one million, six hundred one thousand, nine hundred sixty-eight.

Scientific notation

• Scientific notation: 6.68721601968 × 10¹¹

Factors of 668721601968

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 73602

Divisors of 668721601968

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 84 98 112 147 168 196 294 336 392 588 784 1176 2352 4091 8182 12273 16364 24546 28637 32728 49092 57274 65456 69499 85911 98184 114548 138998 171822 196368 200459 208497 229096 277996 343644 400918 416994 458192 486493 555992 601377 687288 801836 833988 972986 1111984 1202754 1374576 1459479 1603672 1667976 1945972 2405508 2918958 3207344 3335952 3405451 3891944 4811016 5837916 6810902 7783888 9622032 10216353 11675832 13621804 20432706 23351664 27243608 40865412 54487216 81730824 163461648 284320409 568640818 852961227 1137281636 1705922454 1990242863 2274563272 3411844908 3980485726 4549126544 5970728589 6823689816 7960971452 11941457178 13647379632 13931700041 15921942904 23882914356 27863400082 31843885808 41795100123 47765828712 55726800164 83590200246 95531657424 111453600328 167180400492 222907200656 334360800984 668721601968
• Sum of all divisors σ(n): 2010096792000
• Sum of proper divisors (its aliquot sum) s(n): 1341375190032
• 668721601968 is an abundant number, because the sum of its proper divisors (1341375190032) is greater than itself. Its abundance is 672653588064

Bases of 668721601968

• Binary: 1001101110110010111010011101110110110000₂
• Hexadecimal: 0x9BB2E9DDB0
• Base-36: 8J7FKQEO

Squares and roots of 668721601968

• 668721601968 squared (668721601968²) is 447188580938648221473024
• 668721601968 cubed (668721601968³) is 299044664227089467787854665977311232
• The square root of 668721601968 is 817753.9984420743
• The cube root of 668721601968 is 8744.7711975013

Scales and comparisons

• 668,721,601,968 seconds is equal to 21,263 years, 14 weeks, 3 days, 8 hours, 32 minutes, 48 seconds.
• To count from 1 to 668,721,601,968 would take you about forty-two thousand, five hundred twenty-six years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 668721601968 cubic inches would be around 728.7 feet tall.

Recreational maths with 668721601968

• 668721601968 backwards is 869106127866
• The number of decimal digits it has is: 12
• The sum of 668721601968's digits is 60
• More coming soon!