166855 has 16 divisors (see below), whose sum is σ = 229824. Its totient is φ = 115200.

The previous prime is 166853. The next prime is 166861. The reversal of 166855 is 558661.

It is not a de Polignac number, because 166855 - 2¹ = 166853 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (14364).

2¹⁶⁶⁸⁵⁵ is an apocalyptic number.

166855 is a deficient number, since it is larger than the sum of its proper divisors (62969).

166855 is a wasteful number, since it uses less digits than its factorization.

166855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 7200, while the sum is 31.

The square root of 166855 is about 408.4788856232. The cubic root of 166855 is about 55.0528417775.

The spelling of 166855 in words is "one hundred sixty-six thousand, eight hundred fifty-five".