6642937660 has 48 divisors (see below), whose sum is σ = 14127089760. Its totient is φ = 2623622400.

The previous prime is 6642937627. The next prime is 6642937669. The reversal of 6642937660 is 667392466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642937669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761242 + ... + 769918.

It is an arithmetic number, because the mean of its divisors is an integer number (294314370).

Almost surely, 2^6642937660 is an apocalyptic number.

It is an amenable number.

6642937660 is an abundant number, since it is smaller than the sum of its proper divisors (7484152100).

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

6642937660 is a wasteful number, since it uses less digits than its factorization.

6642937660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9166 (or 9164 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

The square root of 6642937660 is about 81504.2186638213. The cubic root of 6642937660 is about 1879.8364181647.

The spelling of 6642937660 in words is "six billion, six hundred forty-two million, nine hundred thirty-seven thousand, six hundred sixty".