166605233 has 4 divisors (see below), whose sum is σ = 168714240. Its totient is φ = 164496228.

The previous prime is 166605217. The next prime is 166605239. The reversal of 166605233 is 332506661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166605233 - 2⁴ = 166605217 is a prime.

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 166605233.

It is not an unprimeable number, because it can be changed into a prime (166605239) 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, 1054385 + ... + 1054542.

It is an arithmetic number, because the mean of its divisors is an integer number (42178560).

Almost surely, 2^166605233 is an apocalyptic number.

It is an amenable number.

166605233 is a deficient number, since it is larger than the sum of its proper divisors (2109007).

166605233 is an equidigital number, since it uses as much as digits as its factorization.

166605233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109006.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 166605233 is about 12907.5649523835. The cubic root of 166605233 is about 550.2535833402.

The spelling of 166605233 in words is "one hundred sixty-six million, six hundred five thousand, two hundred thirty-three".