664408640

Names of 664408640

• Cardinal: 664408640 can be written as Six hundred sixty-four million, four hundred eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 6.6440864 × 10⁸

Factors of 664408640

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 42387

Divisors of 664408640

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 32 35 40 49 56 64 70 80 98 112 140 160 196 224 245 280 320 392 448 490 560 784 980 1120 1568 1960 2240 3136 3920 7840 15680 42373 84746 169492 211865 296611 338984 423730 593222 677968 847460 1186444 1355936 1483055 1694920 2076277 2372888 2711872 2966110 3389840 4152554 4745776 5932220 6779680 8305108 9491552 10381385 11864440 13559360 16610216 18983104 20762770 23728880 33220432 41525540 47457760 66440864 83051080 94915520 132881728 166102160 332204320 664408640
• Sum of all divisors σ(n): 1840472316
• Sum of proper divisors (its aliquot sum) s(n): 1176063676
• 664408640 is an abundant number, because the sum of its proper divisors (1176063676) is greater than itself. Its abundance is 511655036

Bases of 664408640

• Binary: 100111100110100001001001000000₂
• Hexadecimal: 0x279A1240
• Base-36: AZKKZK

Squares and roots of 664408640

• 664408640 squared (664408640²) is 441438840906649600
• 664408640 cubed (664408640³) is 293295779929963427692544000
• The square root of 664408640 is 25776.1253876529
• The cube root of 664408640 is 872.5930651161

Scales and comparisons

• 664,408,640 seconds is equal to 21 years, 6 weeks, 3 days, 21 hours, 57 minutes, 20 seconds.
• To count from 1 to 664,408,640 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 664408640 cubic inches would be around 72.7 feet tall.

Recreational maths with 664408640

• 664408640 backwards is 046804466
• The number of decimal digits it has is: 9
• The sum of 664408640's digits is 38
• More coming soon!