57981166 has 8 divisors (see below), whose sum is σ = 87166800. Its totient is φ = 28925568.

The previous prime is 57981163. The next prime is 57981167. The reversal of 57981166 is 66118975.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×57981166² = 6723631221439112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57981163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31386 + ... + 33181.

It is an arithmetic number, because the mean of its divisors is an integer number (10895850).

Almost surely, 2^57981166 is an apocalyptic number.

57981166 is a deficient number, since it is larger than the sum of its proper divisors (29185634).

57981166 is a wasteful number, since it uses less digits than its factorization.

57981166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65018.

The product of its digits is 90720, while the sum is 43.

The square root of 57981166 is about 7614.5364927880. The cubic root of 57981166 is about 387.0457606241.

The spelling of 57981166 in words is "fifty-seven million, nine hundred eighty-one thousand, one hundred sixty-six".