111857166 has 16 divisors (see below), whose sum is σ = 248571600. Its totient is φ = 37285704.

The previous prime is 111857149. The next prime is 111857167. The reversal of 111857166 is 661758111.

111857166 is a `hidden beast` number, since 11 + 18 + 571 + 66 = 666.

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 111857166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111857167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035661 + ... + 1035768.

It is an arithmetic number, because the mean of its divisors is an integer number (15535725).

Almost surely, 2^111857166 is an apocalyptic number.

111857166 is an abundant number, since it is smaller than the sum of its proper divisors (136714434).

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

111857166 is a wasteful number, since it uses less digits than its factorization.

111857166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071440 (or 2071434 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 111857166 is about 10576.2548191692. The cubic root of 111857166 is about 481.8234547963.

The spelling of 111857166 in words is "one hundred eleven million, eight hundred fifty-seven thousand, one hundred sixty-six".