166159 has 6 divisors (see below), whose sum is σ = 193344. Its totient is φ = 142380.

The previous prime is 166157. The next prime is 166169. The reversal of 166159 is 951661.

It is not a de Polignac number, because 166159 - 2¹ = 166157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1647 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (32224).

2¹⁶⁶¹⁵⁹ is an apocalyptic number.

166159 is a deficient number, since it is larger than the sum of its proper divisors (27185).

166159 is an equidigital number, since it uses as much as digits as its factorization.

166159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405 (or 3398 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 166159 is about 407.6260541231. The cubic root of 166159 is about 54.9761880393.

It can be divided in two parts, 166 and 159, that added together give a triangular number (325 = T₂₅).

The spelling of 166159 in words is "one hundred sixty-six thousand, one hundred fifty-nine".