166188 has 24 divisors (see below), whose sum is σ = 423360. Its totient is φ = 50320.

The previous prime is 166183. The next prime is 166189. The reversal of 166188 is 881661.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166188.

It is not an unprimeable number, because it can be changed into a prime (166183) by changing a digit.

166188 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498 + ... + 761.

It is an arithmetic number, because the mean of its divisors is an integer number (17640).

2¹⁶⁶¹⁸⁸ is an apocalyptic number.

It is an amenable number.

166188 is an abundant number, since it is smaller than the sum of its proper divisors (257172).

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

166188 is a wasteful number, since it uses less digits than its factorization.

166188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1275 counting only the distinct ones).

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

The square root of 166188 is about 407.6616243896. The cubic root of 166188 is about 54.9793862144.

The spelling of 166188 in words is "one hundred sixty-six thousand, one hundred eighty-eight".