12768707666 has 32 divisors (see below), whose sum is σ = 22882910400. Its totient is φ = 5266687680.

The previous prime is 12768707647. The next prime is 12768707671. The reversal of 12768707666 is 66670786721.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361481 + ... + 395228.

It is an arithmetic number, because the mean of its divisors is an integer number (715090950).

Almost surely, 2^12768707666 is an apocalyptic number.

12768707666 is a deficient number, since it is larger than the sum of its proper divisors (10114202734).

12768707666 is a wasteful number, since it uses less digits than its factorization.

12768707666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756794.

The product of its (nonzero) digits is 7112448, while the sum is 56.

The spelling of 12768707666 in words is "twelve billion, seven hundred sixty-eight million, seven hundred seven thousand, six hundred sixty-six".