12722866 has 16 divisors (see below), whose sum is σ = 20664000. Its totient is φ = 5840208.

The previous prime is 12722863. The next prime is 12722873. The reversal of 12722866 is 66822721.

12722866 is nontrivially palindromic in base 15.

It is a super-3 number, since 3×12722866³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12722863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3945 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (1291500).

Almost surely, 2^12722866 is an apocalyptic number.

12722866 is a deficient number, since it is larger than the sum of its proper divisors (7941134).

12722866 is a wasteful number, since it uses less digits than its factorization.

12722866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673.

The product of its digits is 16128, while the sum is 34.

The square root of 12722866 is about 3566.9126706439. The cubic root of 12722866 is about 233.4505945754.

The spelling of 12722866 in words is "twelve million, seven hundred twenty-two thousand, eight hundred sixty-six".