72130664 has 16 divisors (see below), whose sum is σ = 135401220. Its totient is φ = 36023680.

The previous prime is 72130633. The next prime is 72130687. The reversal of 72130664 is 46603127.

It can be written as a sum of positive squares in 2 ways, for example, as 71537764 + 592900 = 8458^2 + 770^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894 + ... + 12354.

Almost surely, 2^72130664 is an apocalyptic number.

It is an amenable number.

72130664 is a deficient number, since it is larger than the sum of its proper divisors (63270556).

72130664 is a wasteful number, since it uses less digits than its factorization.

72130664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420 (or 10416 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 72130664 is about 8492.9773342450. The cubic root of 72130664 is about 416.2682718550.

The spelling of 72130664 in words is "seventy-two million, one hundred thirty thousand, six hundred sixty-four".