166163023 has 4 divisors (see below), whose sum is σ = 178944808. Its totient is φ = 153381240.

The previous prime is 166163009. The next prime is 166163029. The reversal of 166163023 is 320361661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166163023 - 2²¹ = 164065871 is a prime.

It is a super-2 number, since 2×166163023² = 55220300424997058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166162982 and 166163000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166163029) 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, 6390873 + ... + 6390898.

It is an arithmetic number, because the mean of its divisors is an integer number (44736202).

Almost surely, 2^166163023 is an apocalyptic number.

166163023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166163023 is a deficient number, since it is larger than the sum of its proper divisors (12781785).

166163023 is a wasteful number, since it uses less digits than its factorization.

166163023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12781784.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 166163023 is about 12890.4236935797. The cubic root of 166163023 is about 549.7663172564.

The spelling of 166163023 in words is "one hundred sixty-six million, one hundred sixty-three thousand, twenty-three".