72664634 has 8 divisors (see below), whose sum is σ = 124567968. Its totient is φ = 31141980.

The previous prime is 72664621. The next prime is 72664637. The reversal of 72664634 is 43646627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72664637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595152 + ... + 2595179.

It is an arithmetic number, because the mean of its divisors is an integer number (15570996).

Almost surely, 2^72664634 is an apocalyptic number.

72664634 is a deficient number, since it is larger than the sum of its proper divisors (51903334).

72664634 is a wasteful number, since it uses less digits than its factorization.

72664634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190340.

The product of its digits is 145152, while the sum is 38.

The square root of 72664634 is about 8524.3553421945. The cubic root of 72664634 is about 417.2929332825.

The spelling of 72664634 in words is "seventy-two million, six hundred sixty-four thousand, six hundred thirty-four".