188166 has 16 divisors (see below), whose sum is σ = 410688. Its totient is φ = 57000.

The previous prime is 188159. The next prime is 188171. The reversal of 188166 is 661881.

It is a congruent number.

It is an unprimeable number.

188166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1360 + ... + 1491.

It is an arithmetic number, because the mean of its divisors is an integer number (25668).

2¹⁸⁸¹⁶⁶ is an apocalyptic number.

188166 is an abundant number, since it is smaller than the sum of its proper divisors (222522).

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

188166 is a wasteful number, since it uses less digits than its factorization.

188166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

The product of its digits is 2304, while the sum is 30.

The square root of 188166 is about 433.7810507618. The cubic root of 188166 is about 57.3033991326.

It can be divided in two parts, 18816 and 6, that multiplied together give a square (112896 = 336²).

The spelling of 188166 in words is "one hundred eighty-eight thousand, one hundred sixty-six".