663603264 has 84 divisors (see below), whose sum is σ = 1906944624. Its totient is φ = 220637952.

The previous prime is 663603263. The next prime is 663603289. The reversal of 663603264 is 462306366.

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

It is not an unprimeable number, because it can be changed into a prime (663603263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267759 + ... + 270225.

Almost surely, 2^663603264 is an apocalyptic number.

663603264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663603264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953472312).

663603264 is an abundant number, since it is smaller than the sum of its proper divisors (1243341360).

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

663603264 is a wasteful number, since it uses less digits than its factorization.

663603264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 663603264 is about 25760.4981318297. The cubic root of 663603264 is about 872.2403456106.

The spelling of 663603264 in words is "six hundred sixty-three million, six hundred three thousand, two hundred sixty-four".