663255624 has 32 divisors (see below), whose sum is σ = 1658977920. Its totient is φ = 220973376.

The previous prime is 663255617. The next prime is 663255643. The reversal of 663255624 is 426552366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51394 + ... + 62990.

It is an arithmetic number, because the mean of its divisors is an integer number (51843060).

Almost surely, 2^663255624 is an apocalyptic number.

It is an amenable number.

663255624 is an abundant number, since it is smaller than the sum of its proper divisors (995722296).

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

663255624 is a wasteful number, since it uses less digits than its factorization.

663255624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13989 (or 13985 counting only the distinct ones).

The product of its digits is 259200, while the sum is 39.

The square root of 663255624 is about 25753.7497075669. The cubic root of 663255624 is about 872.0880062960.

The spelling of 663255624 in words is "six hundred sixty-three million, two hundred fifty-five thousand, six hundred twenty-four".