668460872 has 16 divisors (see below), whose sum is σ = 1256860800. Its totient is φ = 333298000.

The previous prime is 668460851. The next prime is 668460883. The reversal of 668460872 is 278064866.

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, 113504 + ... + 119247.

It is an arithmetic number, because the mean of its divisors is an integer number (78553800).

Almost surely, 2^668460872 is an apocalyptic number.

It is an amenable number.

668460872 is a deficient number, since it is larger than the sum of its proper divisors (588399928).

668460872 is a wasteful number, since it uses less digits than its factorization.

668460872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233116 (or 233112 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 668460872 is about 25854.6102658694. The cubic root of 668460872 is about 874.3634540984.

The spelling of 668460872 in words is "six hundred sixty-eight million, four hundred sixty thousand, eight hundred seventy-two".