166153423 has 4 divisors (see below), whose sum is σ = 174898360. Its totient is φ = 157408488.

The previous prime is 166153417. The next prime is 166153453. The reversal of 166153423 is 324351661.

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 166153423 - 2⁵ = 166153391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166153453) 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, 4372440 + ... + 4372477.

It is an arithmetic number, because the mean of its divisors is an integer number (43724590).

Almost surely, 2^166153423 is an apocalyptic number.

166153423 is a deficient number, since it is larger than the sum of its proper divisors (8744937).

166153423 is an equidigital number, since it uses as much as digits as its factorization.

166153423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744936.

The product of its digits is 12960, while the sum is 31.

The square root of 166153423 is about 12890.0513187497. The cubic root of 166153423 is about 549.7557295452.

The spelling of 166153423 in words is "one hundred sixty-six million, one hundred fifty-three thousand, four hundred twenty-three".