668960721
668,960,721 is an odd composite number composed of five prime numbers multiplied together.
668960721 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 668960721:
33 × 112 × 13 × 19 × 829
(3 × 3 × 3 × 11 × 11 × 13 × 19 × 829)See below for interesting mathematical facts about the number 668960721 from the Numbermatics database.
Names of 668960721
- Cardinal: 668960721 can be written as Six hundred sixty-eight million, nine hundred sixty thousand, seven hundred twenty-one.
Scientific notation
- Scientific notation: 6.68960721 × 108
Factors of 668960721
Divisors of 668960721
- Number of divisors d(n): 96
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Complete list of divisors:
1 3 9 11 13 19 27 33 39 57 99 117 121 143 171 209 247 297 351 363 429 513 627 741 829 1089 1287 1573 1881 2223 2299 2487 2717 3267 3861 4719 5643 6669 6897 7461 8151 9119 10777 14157 15751 20691 22383 24453 27357 29887 32331 42471 47253 62073 73359 82071 89661 96993 100309 118547 141759 173261 204763 246213 268983 290979 300927 355641 425277 519783 614289 806949 902781 1066923 1304017 1559349 1842867 1905871 2252393 2708343 3200769 3912051 4678047 5528601 5717613 6757179 11736153 17152839 20271537 24776323 35208459 51458517 60814611 74328969 222986907 668960721
- Sum of all divisors σ(n): 1236368000
- Sum of proper divisors (its aliquot sum) s(n): 567407279
- 668960721 is a deficient number, because the sum of its proper divisors (567407279) is less than itself. Its deficiency is 101553442
Bases of 668960721
- Binary: 1001111101111110000111110100012
- Hexadecimal: 0x27DF87D1
- Base-36: B2A5E9
Squares and roots of 668960721
- 668960721 squared (6689607212) is 447508446240839841
- 668960721 cubed (6689607213) is 299365572850861959680885361
-
The
square root of 668960721 is 25864.2749946719 -
The
cube root of 668960721 is 874.5813381091
Scales and comparisons
How big is 668960721?- 668,960,721 seconds is equal to 21 years, 14 weeks, 14 hours, 25 minutes, 21 seconds.
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To count from 1 to 668,960,721 would take you about thirty-one 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 668960721 cubic inches would be around 72.9 feet tall.
Recreational maths with 668960721
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