64663408 has 20 divisors (see below), whose sum is σ = 125460720. Its totient is φ = 32286464.

The previous prime is 64663387. The next prime is 64663411. The reversal of 64663408 is 80436646.

It is a congruent number.

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, 11016 + ... + 15832.

It is an arithmetic number, because the mean of its divisors is an integer number (6273036).

Almost surely, 2^64663408 is an apocalyptic number.

It is an amenable number.

64663408 is a deficient number, since it is larger than the sum of its proper divisors (60797312).

64663408 is a wasteful number, since it uses less digits than its factorization.

64663408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5658 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 64663408 is about 8041.3561045386. The cubic root of 64663408 is about 401.3773518113.

The spelling of 64663408 in words is "sixty-four million, six hundred sixty-three thousand, four hundred eight".