663364256 has 24 divisors (see below), whose sum is σ = 1337854644. Its totient is φ = 323591680.

The previous prime is 663364249. The next prime is 663364277. The reversal of 663364256 is 652463366.

It can be written as a sum of positive squares in 2 ways, for example, as 476112400 + 187251856 = 21820^2 + 13684^2 .

It is a super-2 number, since 2×663364256² = 880104272276867072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 251495 + ... + 254118.

Almost surely, 2^663364256 is an apocalyptic number.

It is an amenable number.

663364256 is an abundant number, since it is smaller than the sum of its proper divisors (674490388).

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

663364256 is a wasteful number, since it uses less digits than its factorization.

663364256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505664 (or 505656 counting only the distinct ones).

The product of its digits is 466560, while the sum is 41.

The square root of 663364256 is about 25755.8586733194. The cubic root of 663364256 is about 872.1356156385.

The spelling of 663364256 in words is "six hundred sixty-three million, three hundred sixty-four thousand, two hundred fifty-six".