12663796717 has 12 divisors (see below), whose sum is σ = 14990459260. Its totient is φ = 10626960960.

The previous prime is 12663796699. The next prime is 12663796721. The reversal of 12663796717 is 71769736621.

It can be written as a sum of positive squares in 2 ways, for example, as 1246019401 + 11417777316 = 35299^2 + 106854^2 .

It is not a de Polignac number, because 12663796717 - 2¹¹ = 12663794669 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 (12663796727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4023792 + ... + 4026937.

Almost surely, 2^12663796717 is an apocalyptic number.

It is an amenable number.

12663796717 is a deficient number, since it is larger than the sum of its proper divisors (2326662543).

12663796717 is a wasteful number, since it uses less digits than its factorization.

12663796717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050764 (or 8050753 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 55.

The spelling of 12663796717 in words is "twelve billion, six hundred sixty-three million, seven hundred ninety-six thousand, seven hundred seventeen".