12722666 has 24 divisors (see below), whose sum is σ = 22088640. Its totient is φ = 5476680.

The previous prime is 12722653. The next prime is 12722683. The reversal of 12722666 is 66622721.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3215 + ... + 5981.

It is an arithmetic number, because the mean of its divisors is an integer number (920360).

Almost surely, 2^12722666 is an apocalyptic number.

12722666 is a deficient number, since it is larger than the sum of its proper divisors (9365974).

12722666 is a wasteful number, since it uses less digits than its factorization.

12722666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810 (or 2799 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 12722666 is about 3566.8846350842. The cubic root of 12722666 is about 233.4493713090.

The spelling of 12722666 in words is "twelve million, seven hundred twenty-two thousand, six hundred sixty-six".