668160904 has 16 divisors (see below), whose sum is σ = 1253116620. Its totient is φ = 333996480.

The previous prime is 668160901. The next prime is 668160931. The reversal of 668160904 is 409061866.

668160904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 384238404 + 283922500 = 19602^2 + 16850^2 .

It is not an unprimeable number, because it can be changed into a prime (668160901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34834 + ... + 50494.

Almost surely, 2^668160904 is an apocalyptic number.

It is an amenable number.

668160904 is a deficient number, since it is larger than the sum of its proper divisors (584955716).

668160904 is a wasteful number, since it uses less digits than its factorization.

668160904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21000 (or 20996 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 668160904 is about 25848.8085605507. The cubic root of 668160904 is about 874.2326459940.

The spelling of 668160904 in words is "six hundred sixty-eight million, one hundred sixty thousand, nine hundred four".