166089 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 86160.

The previous prime is 166081. The next prime is 166099. The reversal of 166089 is 980661.

It is not a de Polignac number, because 166089 - 2³ = 166081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166081) 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, 129 + ... + 590.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2¹⁶⁶⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

166089 is a deficient number, since it is larger than the sum of its proper divisors (110391).

166089 is a wasteful number, since it uses less digits than its factorization.

166089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 166089 is about 407.5401820680. The cubic root of 166089 is about 54.9684667730.

It can be divided in two parts, 16 and 6089, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 166089 in words is "one hundred sixty-six thousand, eighty-nine".