12997566697 has 2 divisors, whose sum is σ = 12997566698. Its totient is φ = 12997566696.

The previous prime is 12997566689. The next prime is 12997566727. The reversal of 12997566697 is 79666579921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12450989056 + 546577641 = 111584^2 + 23379^2 .

It is a cyclic number.

It is not a de Polignac number, because 12997566697 - 2³ = 12997566689 is a prime.

It is not a weakly prime, because it can be changed into another prime (12997566677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6498783348 + 6498783349.

It is an arithmetic number, because the mean of its divisors is an integer number (6498783349).

Almost surely, 2^12997566697 is an apocalyptic number.

It is an amenable number.

12997566697 is a deficient number, since it is larger than the sum of its proper divisors (1).

12997566697 is an equidigital number, since it uses as much as digits as its factorization.

12997566697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77157360, while the sum is 67.

The spelling of 12997566697 in words is "twelve billion, nine hundred ninety-seven million, five hundred sixty-six thousand, six hundred ninety-seven".