166149 has 6 divisors (see below), whose sum is σ = 240006. Its totient is φ = 110760.

The previous prime is 166147. The next prime is 166151. The reversal of 166149 is 941661.

166149 is nontrivially palindromic in base 8.

It is an interprime number because it is at equal distance from previous prime (166147) and next prime (166151).

It can be written as a sum of positive squares in only one way, i.e., 101124 + 65025 = 318^2 + 255^2 .

It is not a de Polignac number, because 166149 - 2¹ = 166147 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9222 + ... + 9239.

It is an arithmetic number, because the mean of its divisors is an integer number (40001).

2¹⁶⁶¹⁴⁹ is an apocalyptic number.

It is an amenable number.

166149 is a deficient number, since it is larger than the sum of its proper divisors (73857).

166149 is a wasteful number, since it uses less digits than its factorization.

166149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18467 (or 18464 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 166149 is about 407.6137877943. The cubic root of 166149 is about 54.9750851341.

Adding to 166149 its sum of digits (27), we get a triangular number (166176 = T₅₇₆).

The spelling of 166149 in words is "one hundred sixty-six thousand, one hundred forty-nine".