166226218 has 16 divisors (see below), whose sum is σ = 261366336. Its totient is φ = 79198560.

The previous prime is 166226201. The next prime is 166226219. The reversal of 166226218 is 812622661.

It is not an unprimeable number, because it can be changed into a prime (166226219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20046 + ... + 27097.

It is an arithmetic number, because the mean of its divisors is an integer number (16335396).

Almost surely, 2^166226218 is an apocalyptic number.

166226218 is a deficient number, since it is larger than the sum of its proper divisors (95140118).

166226218 is a wasteful number, since it uses less digits than its factorization.

166226218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47229.

The product of its digits is 13824, while the sum is 34.

The square root of 166226218 is about 12892.8746988404. The cubic root of 166226218 is about 549.8360039980.

Adding to 166226218 its reverse (812622661), we get a palindrome (978848879).

The spelling of 166226218 in words is "one hundred sixty-six million, two hundred twenty-six thousand, two hundred eighteen".