166323353 has 4 divisors (see below), whose sum is σ = 190083840. Its totient is φ = 142562868.

The previous prime is 166323349. The next prime is 166323371. The reversal of 166323353 is 353323661.

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: 353323661 = 5077 ⋅69593.

It is not a de Polignac number, because 166323353 - 2² = 166323349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166323383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11880233 + ... + 11880246.

It is an arithmetic number, because the mean of its divisors is an integer number (47520960).

Almost surely, 2^166323353 is an apocalyptic number.

It is an amenable number.

166323353 is a deficient number, since it is larger than the sum of its proper divisors (23760487).

166323353 is an equidigital number, since it uses as much as digits as its factorization.

166323353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23760486.

The product of its digits is 29160, while the sum is 32.

The square root of 166323353 is about 12896.6411518659. The cubic root of 166323353 is about 549.9430828153.

The spelling of 166323353 in words is "one hundred sixty-six million, three hundred twenty-three thousand, three hundred fifty-three".