663629256 has 24 divisors (see below), whose sum is σ = 1797329430. Its totient is φ = 221209728.

The previous prime is 663629251. The next prime is 663629257. The reversal of 663629256 is 652926366.

663629256 is a `hidden beast` number, since 6 + 636 + 2 + 9 + 2 + 5 + 6 = 666.

663629256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 521208900 + 142420356 = 22830^2 + 11934^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×663629256² = 880807578838227072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663629251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4608465 + ... + 4608608.

Almost surely, 2^663629256 is an apocalyptic number.

It is an amenable number.

663629256 is an abundant number, since it is smaller than the sum of its proper divisors (1133700174).

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

663629256 is a wasteful number, since it uses less digits than its factorization.

663629256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9217085 (or 9217078 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 663629256 is about 25761.0026202398. The cubic root of 663629256 is about 872.2517334263.

The spelling of 663629256 in words is "six hundred sixty-three million, six hundred twenty-nine thousand, two hundred fifty-six".