12791235666 has 32 divisors (see below), whose sum is σ = 27921423168. Its totient is φ = 3874288640.

The previous prime is 12791235649. The next prime is 12791235707. The reversal of 12791235666 is 66653219721.

12791235666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97090 + ... + 187106.

It is an arithmetic number, because the mean of its divisors is an integer number (872544474).

Almost surely, 2^12791235666 is an apocalyptic number.

12791235666 is an abundant number, since it is smaller than the sum of its proper divisors (15130187502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12791235666 is a wasteful number, since it uses less digits than its factorization.

12791235666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92186.

The product of its digits is 816480, while the sum is 48.

The spelling of 12791235666 in words is "twelve billion, seven hundred ninety-one million, two hundred thirty-five thousand, six hundred sixty-six".