666904392 has 96 divisors (see below), whose sum is σ = 2251903680. Its totient is φ = 173220480.

The previous prime is 666904367. The next prime is 666904409. The reversal of 666904392 is 293409666.

It is a super-2 number, since 2×666904392² = 889522936137779328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54603 + ... + 65690.

It is an arithmetic number, because the mean of its divisors is an integer number (23457330).

Almost surely, 2^666904392 is an apocalyptic number.

It is an amenable number.

666904392 is an abundant number, since it is smaller than the sum of its proper divisors (1584999288).

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

666904392 is a wasteful number, since it uses less digits than its factorization.

666904392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120323 (or 120316 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 666904392 is about 25824.4920956831. The cubic root of 666904392 is about 873.6842885001.

The spelling of 666904392 in words is "six hundred sixty-six million, nine hundred four thousand, three hundred ninety-two".