166123933 has 4 divisors (see below), whose sum is σ = 166275648. Its totient is φ = 165972220.

The previous prime is 166123931. The next prime is 166123943. The reversal of 166123933 is 339321661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 339321661 = 7 ⋅48474523.

It is a cyclic number.

It is not a de Polignac number, because 166123933 - 2¹ = 166123931 is a prime.

It is a super-2 number, since 2×166123933² = 55194322230776978, 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 (166123931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74203 + ... + 76408.

It is an arithmetic number, because the mean of its divisors is an integer number (41568912).

Almost surely, 2^166123933 is an apocalyptic number.

It is an amenable number.

166123933 is a deficient number, since it is larger than the sum of its proper divisors (151715).

166123933 is a wasteful number, since it uses less digits than its factorization.

166123933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151714.

The product of its digits is 17496, while the sum is 34.

The square root of 166123933 is about 12888.9073625347. The cubic root of 166123933 is about 549.7232028691.

The spelling of 166123933 in words is "one hundred sixty-six million, one hundred twenty-three thousand, nine hundred thirty-three".