166875 has 20 divisors (see below), whose sum is σ = 281160. Its totient is φ = 88000.

The previous prime is 166871. The next prime is 166909. The reversal of 166875 is 578661.

It is not a de Polignac number, because 166875 - 2² = 166871 is a prime.

Its product of digits (10080) is a multiple of the sum of its prime factors (112).

It is not an unprimeable number, because it can be changed into a prime (166871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1831 + ... + 1919.

It is an arithmetic number, because the mean of its divisors is an integer number (14058).

2¹⁶⁶⁸⁷⁵ is an apocalyptic number.

166875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166875 is a deficient number, since it is larger than the sum of its proper divisors (114285).

166875 is an frugal number, since it uses more digits than its factorization.

166875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 97 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 166875 is about 408.5033659592. The cubic root of 166875 is about 55.0550413177.

The spelling of 166875 in words is "one hundred sixty-six thousand, eight hundred seventy-five".