166275 has 18 divisors (see below), whose sum is σ = 298220. Its totient is φ = 88560.

The previous prime is 166273. The next prime is 166289. The reversal of 166275 is 572661.

It is not a de Polignac number, because 166275 - 2¹ = 166273 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166273) 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 17 ways as a sum of consecutive naturals, for example, 145 + ... + 594.

2¹⁶⁶²⁷⁵ is an apocalyptic number.

166275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166275 is a deficient number, since it is larger than the sum of its proper divisors (131945).

166275 is a wasteful number, since it uses less digits than its factorization.

166275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 747 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 166275 is about 407.7683165720. The cubic root of 166275 is about 54.9889785078.

It can be divided in two parts, 166 and 275, that added together give a square (441 = 21²).

The spelling of 166275 in words is "one hundred sixty-six thousand, two hundred seventy-five".