12940666 has 8 divisors (see below), whose sum is σ = 19884564. Its totient is φ = 6312480.

The previous prime is 12940661. The next prime is 12940703. The reversal of 12940666 is 66604921.

It can be written as a sum of positive squares in 2 ways, for example, as 12924025 + 16641 = 3595^2 + 129^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12940661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78825 + ... + 78988.

Almost surely, 2^12940666 is an apocalyptic number.

12940666 is a deficient number, since it is larger than the sum of its proper divisors (6943898).

12940666 is a wasteful number, since it uses less digits than its factorization.

12940666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157856.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 12940666 is about 3597.3137199861. The cubic root of 12940666 is about 234.7751947034.

The spelling of 12940666 in words is "twelve million, nine hundred forty thousand, six hundred sixty-six".