12647240666 has 16 divisors (see below), whose sum is σ = 19221930240. Its totient is φ = 6240021840.

The previous prime is 12647240653. The next prime is 12647240681. The reversal of 12647240666 is 66604274621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267440 + ... + 311156.

It is an arithmetic number, because the mean of its divisors is an integer number (1201370640).

Almost surely, 2^12647240666 is an apocalyptic number.

12647240666 is a deficient number, since it is larger than the sum of its proper divisors (6574689574).

12647240666 is a wasteful number, since it uses less digits than its factorization.

12647240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45629.

The product of its (nonzero) digits is 580608, while the sum is 44.

The spelling of 12647240666 in words is "twelve billion, six hundred forty-seven million, two hundred forty thousand, six hundred sixty-six".