12937116661 has 6 divisors (see below), whose sum is σ = 15049299030. Its totient is φ = 11088957096.

The previous prime is 12937116653. The next prime is 12937116667. The reversal of 12937116661 is 16661173921.

It can be written as a sum of positive squares in only one way, i.e., 11086826436 + 1850290225 = 105294^2 + 43015^2 .

It is not a de Polignac number, because 12937116661 - 2³ = 12937116653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12937116667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132011346 + ... + 132011443.

It is an arithmetic number, because the mean of its divisors is an integer number (2508216505).

Almost surely, 2^12937116661 is an apocalyptic number.

It is an amenable number.

12937116661 is a deficient number, since it is larger than the sum of its proper divisors (2112182369).

12937116661 is an equidigital number, since it uses as much as digits as its factorization.

12937116661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264022803 (or 264022796 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The spelling of 12937116661 in words is "twelve billion, nine hundred thirty-seven million, one hundred sixteen thousand, six hundred sixty-one".