6639644340

Names of 6639644340

• Cardinal: 6639644340 can be written as Six billion, six hundred thirty-nine million, six hundred forty-four thousand, three hundred forty.

Scientific notation

• Scientific notation: 6.63964434 × 10⁹

Factors of 6639644340

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 5269576

Divisors of 6639644340

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 28 30 35 36 42 45 60 63 70 84 90 105 126 140 180 210 252 315 420 630 1260 5269559 10539118 15808677 21078236 26347795 31617354 36886913 47426031 52695590 63234708 73773826 79043385 94852062 105391180 110660739 147547652 158086770 184434565 189704124 221321478 237130155 316173540 331982217 368869130 442642956 474260310 553303695 663964434 737738260 948520620 1106607390 1327928868 1659911085 2213214780 3319822170 6639644340
• Sum of all divisors σ(n): 23017438080
• Sum of proper divisors (its aliquot sum) s(n): 16377793740
• 6639644340 is an abundant number, because the sum of its proper divisors (16377793740) is greater than itself. Its abundance is 9738149400

Bases of 6639644340

• Binary: 110001011110000001110111010110100₂
• Hexadecimal: 0x18BC0EEB4
• Base-36: 31T2MD0

Squares and roots of 6639644340

• 6639644340 squared (6639644340²) is 44084876961694035600
• 6639644340 cubed (6639644340³) is 292707903798308200283298504000
• The square root of 6639644340 is 81484.0127877857
• The cube root of 6639644340 is 1879.5257159551

Scales and comparisons

• 6,639,644,340 seconds is equal to 211 years, 6 weeks, 1 day, 17 hours, 39 minutes.
• To count from 1 to 6,639,644,340 would take you about four hundred twenty-two 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 6639644340 cubic inches would be around 156.6 feet tall.

Recreational maths with 6639644340

• 6639644340 backwards is 0434469366
• 6639644340 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 6639644340's digits is 45
• More coming soon!