57272661 has 24 divisors (see below), whose sum is σ = 84502080. Its totient is φ = 37371456.

The previous prime is 57272659. The next prime is 57272681. The reversal of 57272661 is 16627275.

57272661 is a `hidden beast` number, since 572 + 7 + 26 + 61 = 666.

It is not a de Polignac number, because 57272661 - 2¹ = 57272659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57272641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117360 + ... + 117846.

It is an arithmetic number, because the mean of its divisors is an integer number (3520920).

Almost surely, 2^57272661 is an apocalyptic number.

It is an amenable number.

57272661 is a deficient number, since it is larger than the sum of its proper divisors (27229419).

57272661 is a wasteful number, since it uses less digits than its factorization.

57272661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 57272661 is about 7567.8703080854. The cubic root of 57272661 is about 385.4627841356.

The spelling of 57272661 in words is "fifty-seven million, two hundred seventy-two thousand, six hundred sixty-one".