166234261 has 4 divisors (see below), whose sum is σ = 166826124. Its totient is φ = 165642400.

The previous prime is 166234241. The next prime is 166234283. The reversal of 166234261 is 162432661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162432661 = 283 ⋅573967.

It can be written as a sum of positive squares in 2 ways, for example, as 63840100 + 102394161 = 7990^2 + 10119^2 .

It is a cyclic number.

It is not a de Polignac number, because 166234261 - 2²⁷ = 32016533 is a prime.

It is a super-2 number, since 2×166234261² = 55267659060432242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166234231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295510 + ... + 296071.

It is an arithmetic number, because the mean of its divisors is an integer number (41706531).

Almost surely, 2^166234261 is an apocalyptic number.

It is an amenable number.

166234261 is a deficient number, since it is larger than the sum of its proper divisors (591863).

166234261 is an equidigital number, since it uses as much as digits as its factorization.

166234261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591862.

The product of its digits is 10368, while the sum is 31.

The square root of 166234261 is about 12893.1866115402. The cubic root of 166234261 is about 549.8448719526.

The spelling of 166234261 in words is "one hundred sixty-six million, two hundred thirty-four thousand, two hundred sixty-one".