166004223 has 16 divisors (see below), whose sum is σ = 275955456. Its totient is φ = 86235840.

The previous prime is 166004191. The next prime is 166004239. The reversal of 166004223 is 322400661.

It is not a de Polignac number, because 166004223 - 2⁵ = 166004191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166004193 and 166004202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166003223) 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 15 ways as a sum of consecutive naturals, for example, 359086 + ... + 359547.

It is an arithmetic number, because the mean of its divisors is an integer number (17247216).

Almost surely, 2^166004223 is an apocalyptic number.

166004223 is a deficient number, since it is larger than the sum of its proper divisors (109951233).

166004223 is a wasteful number, since it uses less digits than its factorization.

166004223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718654.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 166004223 is about 12884.2626098663. The cubic root of 166004223 is about 549.5911264191.

Adding to 166004223 its reverse (322400661), we get a palindrome (488404884).

The spelling of 166004223 in words is "one hundred sixty-six million, four thousand, two hundred twenty-three".