663441264 has 60 divisors (see below), whose sum is σ = 1858842336. Its totient is φ = 220893696.

The previous prime is 663441263. The next prime is 663441271. The reversal of 663441264 is 462144366.

663441264 is a `hidden beast` number, since 6 + 634 + 4 + 12 + 6 + 4 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663441263) 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, 156744 + ... + 160920.

Almost surely, 2^663441264 is an apocalyptic number.

It is an amenable number.

663441264 is an abundant number, since it is smaller than the sum of its proper divisors (1195401072).

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

663441264 is a wasteful number, since it uses less digits than its factorization.

663441264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294 (or 5285 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 663441264 is about 25757.3535907709. The cubic root of 663441264 is about 872.1693622165.

The spelling of 663441264 in words is "six hundred sixty-three million, four hundred forty-one thousand, two hundred sixty-four".