72512668 has 6 divisors (see below), whose sum is σ = 126897176. Its totient is φ = 36256332.

The previous prime is 72512659. The next prime is 72512707. The reversal of 72512668 is 86621527.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9064080 + ... + 9064087.

Almost surely, 2^72512668 is an apocalyptic number.

It is an amenable number.

72512668 is a deficient number, since it is larger than the sum of its proper divisors (54384508).

72512668 is a wasteful number, since it uses less digits than its factorization.

72512668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18128171 (or 18128169 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 72512668 is about 8515.4370410449. The cubic root of 72512668 is about 417.0018306617.

The spelling of 72512668 in words is "seventy-two million, five hundred twelve thousand, six hundred sixty-eight".