64566916 has 6 divisors (see below), whose sum is σ = 112992110. Its totient is φ = 32283456.

The previous prime is 64566907. The next prime is 64566917. The reversal of 64566916 is 61966546.

64566916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 62346816 + 2220100 = 7896^2 + 1490^2 .

It is not an unprimeable number, because it can be changed into a prime (64566917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8070861 + ... + 8070868.

Almost surely, 2^64566916 is an apocalyptic number.

It is an amenable number.

64566916 is a deficient number, since it is larger than the sum of its proper divisors (48425194).

64566916 is a wasteful number, since it uses less digits than its factorization.

64566916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16141733 (or 16141731 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 64566916 is about 8035.3541303417. The cubic root of 64566916 is about 401.1776047157.

The spelling of 64566916 in words is "sixty-four million, five hundred sixty-six thousand, nine hundred sixteen".