663536456 has 32 divisors (see below), whose sum is σ = 1390344480. Its totient is φ = 294249600.

The previous prime is 663536441. The next prime is 663536507. The reversal of 663536456 is 654635366.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 88346 + ... + 95561.

It is an arithmetic number, because the mean of its divisors is an integer number (43448265).

Almost surely, 2^663536456 is an apocalyptic number.

It is an amenable number.

663536456 is an abundant number, since it is smaller than the sum of its proper divisors (726808024).

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

663536456 is a wasteful number, since it uses less digits than its factorization.

663536456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183965 (or 183961 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 44.

The square root of 663536456 is about 25759.2013851361. The cubic root of 663536456 is about 872.2110738093.

The spelling of 663536456 in words is "six hundred sixty-three million, five hundred thirty-six thousand, four hundred fifty-six".