6628688864 has 24 divisors (see below), whose sum is σ = 14914550448. Its totient is φ = 2840866560.

The previous prime is 6628688837. The next prime is 6628688873. The reversal of 6628688864 is 4688868266.

It is a super-2 number, since 2×6628688864² = 87879032111435220992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6628688797 and 6628688806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14795957 + ... + 14796404.

It is an arithmetic number, because the mean of its divisors is an integer number (621439602).

Almost surely, 2^6628688864 is an apocalyptic number.

It is an amenable number.

6628688864 is an abundant number, since it is smaller than the sum of its proper divisors (8285861584).

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

6628688864 is a wasteful number, since it uses less digits than its factorization.

6628688864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29592378 (or 29592370 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 62.

The square root of 6628688864 is about 81416.7603383972. The cubic root of 6628688864 is about 1878.4914017971.

The spelling of 6628688864 in words is "six billion, six hundred twenty-eight million, six hundred eighty-eight thousand, eight hundred sixty-four".