166154023 has 4 divisors (see below), whose sum is σ = 189890320. Its totient is φ = 142417728.

The previous prime is 166154003. The next prime is 166154029. The reversal of 166154023 is 320451661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166154023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166153982 and 166154000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166154029) 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, 11868138 + ... + 11868151.

It is an arithmetic number, because the mean of its divisors is an integer number (47472580).

Almost surely, 2^166154023 is an apocalyptic number.

166154023 is a deficient number, since it is larger than the sum of its proper divisors (23736297).

166154023 is an equidigital number, since it uses as much as digits as its factorization.

166154023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23736296.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 166154023 is about 12890.0745924917. The cubic root of 166154023 is about 549.7563912891.

The spelling of 166154023 in words is "one hundred sixty-six million, one hundred fifty-four thousand, twenty-three".