12665809797 has 8 divisors (see below), whose sum is σ = 16928052960. Its totient is φ = 8423719920.

The previous prime is 12665809789. The next prime is 12665809861. The reversal of 12665809797 is 79790856621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12665809797 - 2³ = 12665809789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12665809797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665809747) 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 7 ways as a sum of consecutive naturals, for example, 5036854 + ... + 5039367.

It is an arithmetic number, because the mean of its divisors is an integer number (2116006620).

Almost surely, 2^12665809797 is an apocalyptic number.

It is an amenable number.

12665809797 is a deficient number, since it is larger than the sum of its proper divisors (4262243163).

12665809797 is a wasteful number, since it uses less digits than its factorization.

12665809797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076643.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 12665809797 in words is "twelve billion, six hundred sixty-five million, eight hundred nine thousand, seven hundred ninety-seven".