63664616 has 8 divisors (see below), whose sum is σ = 119371170. Its totient is φ = 31832304.

The previous prime is 63664613. The next prime is 63664619. The reversal of 63664616 is 61646636.

63664616 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (63664613) and next prime (63664619).

It can be written as a sum of positive squares in only one way, i.e., 31967716 + 31696900 = 5654^2 + 5630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 63664616.

It is not an unprimeable number, because it can be changed into a prime (63664613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3979031 + ... + 3979046.

Almost surely, 2^63664616 is an apocalyptic number.

It is an amenable number.

63664616 is a deficient number, since it is larger than the sum of its proper divisors (55706554).

63664616 is a wasteful number, since it uses less digits than its factorization.

63664616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7958083 (or 7958079 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 63664616 is about 7979.0109662790. The cubic root of 63664616 is about 399.3000592551.

The spelling of 63664616 in words is "sixty-three million, six hundred sixty-four thousand, six hundred sixteen".