72664422 has 32 divisors (see below), whose sum is σ = 147363840. Its totient is φ = 23885280.

The previous prime is 72664399. The next prime is 72664433. The reversal of 72664422 is 22446627.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186604 + ... + 186992.

It is an arithmetic number, because the mean of its divisors is an integer number (4605120).

Almost surely, 2^72664422 is an apocalyptic number.

72664422 is an abundant number, since it is smaller than the sum of its proper divisors (74699418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72664422 is a wasteful number, since it uses less digits than its factorization.

72664422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its digits is 32256, while the sum is 33.

The square root of 72664422 is about 8524.3429072275. The cubic root of 72664422 is about 417.2925274629.

The spelling of 72664422 in words is "seventy-two million, six hundred sixty-four thousand, four hundred twenty-two".