12220166 has 16 divisors (see below), whose sum is σ = 20998656. Its totient is φ = 5224776.

The previous prime is 12220147. The next prime is 12220171. The reversal of 12220166 is 66102221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 7475 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (1312416).

Almost surely, 2^12220166 is an apocalyptic number.

12220166 is a deficient number, since it is larger than the sum of its proper divisors (8778490).

12220166 is a wasteful number, since it uses less digits than its factorization.

12220166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12220166 is about 3495.7354018861. The cubic root of 12220166 is about 230.3345226706.

Adding to 12220166 its reverse (66102221), we get a palindrome (78322387).

The spelling of 12220166 in words is "twelve million, two hundred twenty thousand, one hundred sixty-six".