663503256 has 96 divisors (see below), whose sum is σ = 2037126000. Its totient is φ = 193404672.

The previous prime is 663503227. The next prime is 663503257. The reversal of 663503256 is 652305366.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 663503256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663503257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871 + ... + 36438.

Almost surely, 2^663503256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663503256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018563000).

663503256 is an abundant number, since it is smaller than the sum of its proper divisors (1373622744).

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

663503256 is a wasteful number, since it uses less digits than its factorization.

663503256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37353 (or 37346 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The square root of 663503256 is about 25758.5569471584. The cubic root of 663503256 is about 872.1965265600.

The spelling of 663503256 in words is "six hundred sixty-three million, five hundred three thousand, two hundred fifty-six".