72664356 has 12 divisors (see below), whose sum is σ = 169550192. Its totient is φ = 24221448.

The previous prime is 72664321. The next prime is 72664357. The reversal of 72664356 is 65346627.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (72664357) 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, 3027670 + ... + 3027693.

Almost surely, 2^72664356 is an apocalyptic number.

It is an amenable number.

72664356 is an abundant number, since it is smaller than the sum of its proper divisors (96885836).

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

72664356 is a wasteful number, since it uses less digits than its factorization.

72664356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6055370 (or 6055368 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 72664356 is about 8524.3390359605. The cubic root of 72664356 is about 417.2924011227.

The spelling of 72664356 in words is "seventy-two million, six hundred sixty-four thousand, three hundred fifty-six".