663536728 has 16 divisors (see below), whose sum is σ = 1244929680. Its totient is φ = 331555488.

The previous prime is 663536719. The next prime is 663536747. The reversal of 663536728 is 827635366.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 12951 + ... + 38662.

It is an arithmetic number, because the mean of its divisors is an integer number (77808105).

Almost surely, 2^663536728 is an apocalyptic number.

It is an amenable number.

663536728 is a deficient number, since it is larger than the sum of its proper divisors (581392952).

663536728 is a wasteful number, since it uses less digits than its factorization.

663536728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53226 (or 53222 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The square root of 663536728 is about 25759.2066648024. The cubic root of 663536728 is about 872.2111929895.

The spelling of 663536728 in words is "six hundred sixty-three million, five hundred thirty-six thousand, seven hundred twenty-eight".