63664372 has 6 divisors (see below), whose sum is σ = 111412658. Its totient is φ = 31832184.

The previous prime is 63664357. The next prime is 63664399. The reversal of 63664372 is 27346636.

It can be written as a sum of positive squares in only one way, i.e., 34999056 + 28665316 = 5916^2 + 5354^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7958043 + ... + 7958050.

Almost surely, 2^63664372 is an apocalyptic number.

It is an amenable number.

63664372 is a deficient number, since it is larger than the sum of its proper divisors (47748286).

63664372 is a wasteful number, since it uses less digits than its factorization.

63664372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916097 (or 15916095 counting only the distinct ones).

The product of its digits is 108864, while the sum is 37.

The square root of 63664372 is about 7978.9956761487. The cubic root of 63664372 is about 399.2995491374.

The spelling of 63664372 in words is "sixty-three million, six hundred sixty-four thousand, three hundred seventy-two".