166274 has 4 divisors (see below), whose sum is σ = 249414. Its totient is φ = 83136.

The previous prime is 166273. The next prime is 166289. The reversal of 166274 is 472661.

166274 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 472661 = 7 ⋅67523.

It can be written as a sum of positive squares in only one way, i.e., 165649 + 625 = 407^2 + 25^2 .

It is not an unprimeable number, because it can be changed into a prime (166273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41567 + ... + 41570.

2¹⁶⁶²⁷⁴ is an apocalyptic number.

166274 is a deficient number, since it is larger than the sum of its proper divisors (83140).

166274 is an equidigital number, since it uses as much as digits as its factorization.

166274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83139.

The product of its digits is 2016, while the sum is 26.

The square root of 166274 is about 407.7670903837. The cubic root of 166274 is about 54.9888682706.

The spelling of 166274 in words is "one hundred sixty-six thousand, two hundred seventy-four".