63668864 has 32 divisors (see below), whose sum is σ = 144962400. Its totient is φ = 27286272.

The previous prime is 63668849. The next prime is 63668873. The reversal of 63668864 is 46886636.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34634 + ... + 36425.

It is an arithmetic number, because the mean of its divisors is an integer number (4530075).

Almost surely, 2^63668864 is an apocalyptic number.

63668864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63668864 is an abundant number, since it is smaller than the sum of its proper divisors (81293536).

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

63668864 is an equidigital number, since it uses as much as digits as its factorization.

63668864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71080 (or 71068 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The square root of 63668864 is about 7979.2771602445. The cubic root of 63668864 is about 399.3089401115.

The spelling of 63668864 in words is "sixty-three million, six hundred sixty-eight thousand, eight hundred sixty-four".