166185 has 16 divisors (see below), whose sum is σ = 295680. Its totient is φ = 88560.

The previous prime is 166183. The next prime is 166189. The reversal of 166185 is 581661.

It is not a de Polignac number, because 166185 - 2¹ = 166183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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

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 15 ways as a sum of consecutive naturals, for example, 481 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (18480).

2¹⁶⁶¹⁸⁵ is an apocalyptic number.

166185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166185 is a deficient number, since it is larger than the sum of its proper divisors (129495).

166185 is a wasteful number, since it uses less digits than its factorization.

166185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245 (or 1239 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 166185 is about 407.6579448508. The cubic root of 166185 is about 54.9790553860.

It can be divided in two parts, 166 and 185, that added together give a triangular number (351 = T₂₆).

The spelling of 166185 in words is "one hundred sixty-six thousand, one hundred eighty-five".