664417696 has 24 divisors (see below), whose sum is σ = 1315310724. Its totient is φ = 330370560.

The previous prime is 664417661. The next prime is 664417717. The reversal of 664417696 is 696714466.

It can be written as a sum of positive squares in 2 ways, for example, as 650250000 + 14167696 = 25500^2 + 3764^2 .

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, 51565 + ... + 63148.

Almost surely, 2^664417696 is an apocalyptic number.

It is an amenable number.

664417696 is a deficient number, since it is larger than the sum of its proper divisors (650893028).

664417696 is a wasteful number, since it uses less digits than its factorization.

664417696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114904 (or 114896 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 664417696 is about 25776.3010534871. The cubic root of 664417696 is about 872.5970296274.

The spelling of 664417696 in words is "six hundred sixty-four million, four hundred seventeen thousand, six hundred ninety-six".