166271 has 4 divisors (see below), whose sum is σ = 190032. Its totient is φ = 142512.

The previous prime is 166259. The next prime is 166273. The reversal of 166271 is 172661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172661 = 23 ⋅7507.

It is a cyclic number.

It is not a de Polignac number, because 166271 - 2⁶ = 166207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166271.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11870 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (47508).

2¹⁶⁶²⁷¹ is an apocalyptic number.

166271 is a deficient number, since it is larger than the sum of its proper divisors (23761).

166271 is an equidigital number, since it uses as much as digits as its factorization.

166271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23760.

The product of its digits is 504, while the sum is 23.

The square root of 166271 is about 407.7634117966. The cubic root of 166271 is about 54.9885375562.

The spelling of 166271 in words is "one hundred sixty-six thousand, two hundred seventy-one".