6687616404 has 48 divisors (see below), whose sum is σ = 17843614208. Its totient is φ = 1909679328.

The previous prime is 6687616399. The next prime is 6687616489. The reversal of 6687616404 is 4046167866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135507 + ... + 178149.

Almost surely, 2^6687616404 is an apocalyptic number.

It is an amenable number.

6687616404 is an abundant number, since it is smaller than the sum of its proper divisors (11155997804).

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

6687616404 is a wasteful number, since it uses less digits than its factorization.

6687616404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44524 (or 44522 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 6687616404 is about 81777.8478807067. The cubic root of 6687616404 is about 1884.0414420588.

The spelling of 6687616404 in words is "six billion, six hundred eighty-seven million, six hundred sixteen thousand, four hundred four".