663117872 has 20 divisors (see below), whose sum is σ = 1285240656. Its totient is φ = 331442880.

The previous prime is 663117809. The next prime is 663117881. The reversal of 663117872 is 278711366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57278 + ... + 67874.

Almost surely, 2^663117872 is an apocalyptic number.

It is an amenable number.

663117872 is a deficient number, since it is larger than the sum of its proper divisors (622122784).

663117872 is a wasteful number, since it uses less digits than its factorization.

663117872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14516 (or 14510 counting only the distinct ones).

The product of its digits is 84672, while the sum is 41.

The square root of 663117872 is about 25751.0751620199. The cubic root of 663117872 is about 872.0276272705.

The spelling of 663117872 in words is "six hundred sixty-three million, one hundred seventeen thousand, eight hundred seventy-two".