72665725 has 24 divisors (see below), whose sum is σ = 99056160. Its totient is φ = 52440000.

The previous prime is 72665699. The next prime is 72665771. The reversal of 72665725 is 52756627.

It is not a de Polignac number, because 72665725 - 2¹¹ = 72663677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37275 + ... + 39175.

It is an arithmetic number, because the mean of its divisors is an integer number (4127340).

Almost surely, 2^72665725 is an apocalyptic number.

It is an amenable number.

72665725 is a deficient number, since it is larger than the sum of its proper divisors (26390435).

72665725 is a wasteful number, since it uses less digits than its factorization.

72665725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2056 counting only the distinct ones).

The product of its digits is 176400, while the sum is 40.

The square root of 72665725 is about 8524.4193350632. The cubic root of 72665725 is about 417.2950217093.

The spelling of 72665725 in words is "seventy-two million, six hundred sixty-five thousand, seven hundred twenty-five".