57111966 has 20 divisors (see below), whose sum is σ = 127973472. Its totient is φ = 19037268.

The previous prime is 57111949. The next prime is 57111973. The reversal of 57111966 is 66911175.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 57111966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 176110 + ... + 176433.

Almost surely, 2^57111966 is an apocalyptic number.

57111966 is an abundant number, since it is smaller than the sum of its proper divisors (70861506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57111966 is a wasteful number, since it uses less digits than its factorization.

57111966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352557 (or 352548 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 57111966 is about 7557.2459269234. The cubic root of 57111966 is about 385.1019373634.

The spelling of 57111966 in words is "fifty-seven million, one hundred eleven thousand, nine hundred sixty-six".