72872661 has 16 divisors (see below), whose sum is σ = 100528640. Its totient is φ = 46906560.

The previous prime is 72872651. The next prime is 72872669. The reversal of 72872661 is 16627827.

It is not a de Polignac number, because 72872661 - 2¹¹ = 72870613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72872669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67635 + ... + 68703.

It is an arithmetic number, because the mean of its divisors is an integer number (6283040).

Almost surely, 2^72872661 is an apocalyptic number.

It is an amenable number.

72872661 is a deficient number, since it is larger than the sum of its proper divisors (27655979).

72872661 is a wasteful number, since it uses less digits than its factorization.

72872661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836.

The product of its digits is 56448, while the sum is 39.

The square root of 72872661 is about 8536.5485414188. The cubic root of 72872661 is about 417.6907677563.

The spelling of 72872661 in words is "seventy-two million, eight hundred seventy-two thousand, six hundred sixty-one".