668475189964 has 12 divisors (see below), whose sum is σ = 1181189171344. Its totient is φ = 330992569584.

The previous prime is 668475189953. The next prime is 668475189973. The reversal of 668475189964 is 469981574866.

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, 811255887 + ... + 811256710.

Almost surely, 2^668475189964 is an apocalyptic number.

It is an amenable number.

668475189964 is a deficient number, since it is larger than the sum of its proper divisors (512713981380).

668475189964 is a wasteful number, since it uses less digits than its factorization.

668475189964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622512704 (or 1622512702 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 73.

The spelling of 668475189964 in words is "six hundred sixty-eight billion, four hundred seventy-five million, one hundred eighty-nine thousand, nine hundred sixty-four".