57668981 has 16 divisors (see below), whose sum is σ = 64520064. Its totient is φ = 51262464.

The previous prime is 57668927. The next prime is 57668987. The reversal of 57668981 is 18986675.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 57668981 - 2²² = 53474677 is a prime.

It is a super-2 number, since 2×57668981² = 6651422739156722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57668987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31565 + ... + 33341.

It is an arithmetic number, because the mean of its divisors is an integer number (4032504).

Almost surely, 2^57668981 is an apocalyptic number.

It is an amenable number.

57668981 is a deficient number, since it is larger than the sum of its proper divisors (6851083).

57668981 is a wasteful number, since it uses less digits than its factorization.

57668981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900.

The product of its digits is 725760, while the sum is 50.

The square root of 57668981 is about 7594.0095470048. The cubic root of 57668981 is about 386.3498599865.

The spelling of 57668981 in words is "fifty-seven million, six hundred sixty-eight thousand, nine hundred eighty-one".