6687404 has 12 divisors (see below), whose sum is σ = 11878104. Its totient is φ = 3293664.

The previous prime is 6687391. The next prime is 6687427. The reversal of 6687404 is 4047866.

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, 12209 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (989842).

Almost surely, 2^6687404 is an apocalyptic number.

It is an amenable number.

6687404 is a deficient number, since it is larger than the sum of its proper divisors (5190700).

6687404 is a wasteful number, since it uses less digits than its factorization.

6687404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25024 (or 25022 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 6687404 is about 2586.0015467899. The cubic root of 6687404 is about 188.4021495631.

The spelling of 6687404 in words is "six million, six hundred eighty-seven thousand, four hundred four".