12666935137 has 4 divisors (see below), whose sum is σ = 12742785216. Its totient is φ = 12591085060.

The previous prime is 12666935131. The next prime is 12666935147. The reversal of 12666935137 is 73153966621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12666935137 - 2⁷ = 12666935009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666935131) 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, 37924789 + ... + 37925122.

It is an arithmetic number, because the mean of its divisors is an integer number (3185696304).

Almost surely, 2^12666935137 is an apocalyptic number.

It is an amenable number.

12666935137 is a deficient number, since it is larger than the sum of its proper divisors (75850079).

12666935137 is an equidigital number, since it uses as much as digits as its factorization.

12666935137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75850078.

The product of its digits is 1224720, while the sum is 49.

The spelling of 12666935137 in words is "twelve billion, six hundred sixty-six million, nine hundred thirty-five thousand, one hundred thirty-seven".