12918866 has 8 divisors (see below), whose sum is σ = 19477260. Its totient is φ = 6426448.

The previous prime is 12918853. The next prime is 12918887. The reversal of 12918866 is 66881921.

It can be written as a sum of positive squares in 2 ways, for example, as 11662225 + 1256641 = 3415^2 + 1121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16001 + ... + 16788.

Almost surely, 2^12918866 is an apocalyptic number.

12918866 is a deficient number, since it is larger than the sum of its proper divisors (6558394).

12918866 is a wasteful number, since it uses less digits than its factorization.

12918866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32988.

The product of its digits is 41472, while the sum is 41.

The square root of 12918866 is about 3594.2824040412. The cubic root of 12918866 is about 234.6432855744.

The spelling of 12918866 in words is "twelve million, nine hundred eighteen thousand, eight hundred sixty-six".