166323 has 4 divisors (see below), whose sum is σ = 221768. Its totient is φ = 110880.

The previous prime is 166319. The next prime is 166349. The reversal of 166323 is 323661.

166323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 166323 - 2² = 166319 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166323.

It is not an unprimeable number, because it can be changed into a prime (166303) 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, 27718 + ... + 27723.

It is an arithmetic number, because the mean of its divisors is an integer number (55442).

2¹⁶⁶³²³ is an apocalyptic number.

166323 is a deficient number, since it is larger than the sum of its proper divisors (55445).

166323 is an equidigital number, since it uses as much as digits as its factorization.

166323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55444.

The product of its digits is 648, while the sum is 21.

The square root of 166323 is about 407.8271692764. The cubic root of 166323 is about 54.9942693754.

Adding to 166323 its reverse (323661), we get a palindrome (489984).

The spelling of 166323 in words is "one hundred sixty-six thousand, three hundred twenty-three".