6668904 has 32 divisors (see below), whose sum is σ = 18188640. Its totient is φ = 2020800.

The previous prime is 6668903. The next prime is 6668911. The reversal of 6668904 is 4098666.

It is a super-2 number, since 2×6668904² = 88948561122432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6668903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12367 + ... + 12894.

It is an arithmetic number, because the mean of its divisors is an integer number (568395).

Almost surely, 2^6668904 is an apocalyptic number.

It is an amenable number.

6668904 is an abundant number, since it is smaller than the sum of its proper divisors (11519736).

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

6668904 is a wasteful number, since it uses less digits than its factorization.

6668904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25281 (or 25277 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 6668904 is about 2582.4221188644. The cubic root of 6668904 is about 188.2282575341.

The spelling of 6668904 in words is "six million, six hundred sixty-eight thousand, nine hundred four".