12665809796 has 6 divisors (see below), whose sum is σ = 22165167150. Its totient is φ = 6332904896.

The previous prime is 12665809789. The next prime is 12665809861. The reversal of 12665809796 is 69790856621.

It can be written as a sum of positive squares in only one way, i.e., 9161169796 + 3504640000 = 95714^2 + 59200^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583226221 + ... + 1583226228.

It is an arithmetic number, because the mean of its divisors is an integer number (3694194525).

Almost surely, 2^12665809796 is an apocalyptic number.

It is an amenable number.

12665809796 is a deficient number, since it is larger than the sum of its proper divisors (9499357354).

12665809796 is a wasteful number, since it uses less digits than its factorization.

12665809796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166452453 (or 3166452451 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 12665809796 in words is "twelve billion, six hundred sixty-five million, eight hundred nine thousand, seven hundred ninety-six".