6688902621908 has 24 divisors (see below), whose sum is σ = 12913472420520. Its totient is φ = 3011888609280.

The previous prime is 6688902621899. The next prime is 6688902621913. The reversal of 6688902621908 is 8091262098866.

It can be written as a sum of positive squares in 4 ways, for example, as 9096962884 + 6679805659024 = 95378^2 + 2584532^2 .

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568689853 + ... + 1568694116.

It is an arithmetic number, because the mean of its divisors is an integer number (538061350855).

Almost surely, 2^{6688902621908} is an apocalyptic number.

It is an amenable number.

6688902621908 is a deficient number, since it is larger than the sum of its proper divisors (6224569798612).

6688902621908 is a wasteful number, since it uses less digits than its factorization.

6688902621908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3137384027 (or 3137384025 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 65.

The spelling of 6688902621908 in words is "six trillion, six hundred eighty-eight billion, nine hundred two million, six hundred twenty-one thousand, nine hundred eight".