64663552 has 26 divisors (see below), whose sum is σ = 129319508. Its totient is φ = 32329728.

The previous prime is 64663549. The next prime is 64663553. The reversal of 64663552 is 25536646.

It is not an unprimeable number, because it can be changed into a prime (64663553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3798 + ... + 11989.

Almost surely, 2^64663552 is an apocalyptic number.

It is an amenable number.

64663552 is a deficient number, since it is larger than the sum of its proper divisors (64655956).

64663552 is an equidigital number, since it uses as much as digits as its factorization.

64663552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15811 (or 15789 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 64663552 is about 8041.3650582473. The cubic root of 64663552 is about 401.3776497557.

The spelling of 64663552 in words is "sixty-four million, six hundred sixty-three thousand, five hundred fifty-two".