166623369 has 16 divisors (see below), whose sum is σ = 255118080. Its totient is φ = 95668560.

The previous prime is 166623349. The next prime is 166623371. The reversal of 166623369 is 963326661.

It is not a de Polignac number, because 166623369 - 2⁵ = 166623337 is a prime.

It is a super-2 number, since 2×166623369² = 55526694193820322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166623369.

It is not an unprimeable number, because it can be changed into a prime (166623349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132247 + ... + 133500.

It is an arithmetic number, because the mean of its divisors is an integer number (15944880).

Almost surely, 2^166623369 is an apocalyptic number.

166623369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

166623369 is a deficient number, since it is larger than the sum of its proper divisors (88494711).

166623369 is a wasteful number, since it uses less digits than its factorization.

166623369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265780.

The product of its digits is 209952, while the sum is 42.

The square root of 166623369 is about 12908.2674670151. The cubic root of 166623369 is about 550.2735487733.

The spelling of 166623369 in words is "one hundred sixty-six million, six hundred twenty-three thousand, three hundred sixty-nine".