63661872 has 40 divisors (see below), whose sum is σ = 174136176. Its totient is φ = 19972096.

The previous prime is 63661853. The next prime is 63661901. The reversal of 63661872 is 27816636.

63661872 is nontrivially palindromic in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 63661872.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38193 + ... + 39824.

Almost surely, 2^63661872 is an apocalyptic number.

It is an amenable number.

63661872 is an abundant number, since it is smaller than the sum of its proper divisors (110474304).

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

63661872 is a wasteful number, since it uses less digits than its factorization.

63661872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78045 (or 78039 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 63661872 is about 7978.8390132901. The cubic root of 63661872 is about 399.2943224468.

The spelling of 63661872 in words is "sixty-three million, six hundred sixty-one thousand, eight hundred seventy-two".