72664516 has 24 divisors (see below), whose sum is σ = 129467520. Its totient is φ = 35679072.

The previous prime is 72664439. The next prime is 72664547. The reversal of 72664516 is 61546627.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71226 + ... + 72238.

It is an arithmetic number, because the mean of its divisors is an integer number (5394480).

Almost surely, 2^72664516 is an apocalyptic number.

It is an amenable number.

72664516 is a deficient number, since it is larger than the sum of its proper divisors (56803004).

72664516 is a wasteful number, since it uses less digits than its factorization.

72664516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 1321 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 72664516 is about 8524.3484208472. The cubic root of 72664516 is about 417.2927074019.

The spelling of 72664516 in words is "seventy-two million, six hundred sixty-four thousand, five hundred sixteen".