6642920 has 32 divisors (see below), whose sum is σ = 15827400. Its totient is φ = 2500608.

The previous prime is 6642919. The next prime is 6642991. The reversal of 6642920 is 292466.

It can be written as a sum of positive squares in 4 ways, for example, as 5654884 + 988036 = 2378^2 + 994^2 .

It is a super-2 number, since 2×6642920² = 88256772252800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4205 + ... + 5564.

Almost surely, 2^6642920 is an apocalyptic number.

It is an amenable number.

6642920 is an abundant number, since it is smaller than the sum of its proper divisors (9184480).

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

6642920 is a wasteful number, since it uses less digits than its factorization.

6642920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9797 (or 9793 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6642920 is about 2577.3862729517. The cubic root of 6642920 is about 187.9834752338.

The spelling of 6642920 in words is "six million, six hundred forty-two thousand, nine hundred twenty".