6642622140 has 96 divisors (see below), whose sum is σ = 23188806144. Its totient is φ = 1380284160.

The previous prime is 6642622139. The next prime is 6642622169. The reversal of 6642622140 is 412262466.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714279 + ... + 723518.

It is an arithmetic number, because the mean of its divisors is an integer number (241550064).

Almost surely, 2^6642622140 is an apocalyptic number.

6642622140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6642622140 is an abundant number, since it is smaller than the sum of its proper divisors (16546184004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6642622140 is a wasteful number, since it uses less digits than its factorization.

6642622140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437827 (or 1437825 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 6642622140 is about 81502.2830355077. The cubic root of 6642622140 is about 1879.8066554599.

The spelling of 6642622140 in words is "six billion, six hundred forty-two million, six hundred twenty-two thousand, one hundred forty".