663217072 has 40 divisors (see below), whose sum is σ = 1471977216. Its totient is φ = 283573056.

The previous prime is 663217067. The next prime is 663217091. The reversal of 663217072 is 270712366.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42933 + ... + 56299.

Almost surely, 2^663217072 is an apocalyptic number.

It is an amenable number.

663217072 is an abundant number, since it is smaller than the sum of its proper divisors (808760144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663217072 is a wasteful number, since it uses less digits than its factorization.

663217072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13825 (or 13819 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 663217072 is about 25753.0012231584. The cubic root of 663217072 is about 872.0711091465.

The spelling of 663217072 in words is "six hundred sixty-three million, two hundred seventeen thousand, seventy-two".