12722166 has 12 divisors (see below), whose sum is σ = 27564732. Its totient is φ = 4240716.

The previous prime is 12722159. The next prime is 12722167. The reversal of 12722166 is 66122721.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12722167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 353376 + ... + 353411.

It is an arithmetic number, because the mean of its divisors is an integer number (2297061).

Almost surely, 2^12722166 is an apocalyptic number.

12722166 is an abundant number, since it is smaller than the sum of its proper divisors (14842566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12722166 is a wasteful number, since it uses less digits than its factorization.

12722166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706795 (or 706792 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12722166 is about 3566.8145452210. The cubic root of 12722166 is about 233.4463130869.

Adding to 12722166 its reverse (66122721), we get a palindrome (78844887).

The spelling of 12722166 in words is "twelve million, seven hundred twenty-two thousand, one hundred sixty-six".