12665160509 has 2 divisors, whose sum is σ = 12665160510. Its totient is φ = 12665160508.

The previous prime is 12665160451. The next prime is 12665160523. The reversal of 12665160509 is 90506156621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11549800900 + 1115359609 = 107470^2 + 33397^2 .

It is an emirp because it is prime and its reverse (90506156621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12665160509 - 2⁸ = 12665160253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665160539) 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 as a sum of consecutive naturals, namely, 6332580254 + 6332580255.

It is an arithmetic number, because the mean of its divisors is an integer number (6332580255).

Almost surely, 2^12665160509 is an apocalyptic number.

It is an amenable number.

12665160509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665160509 is an equidigital number, since it uses as much as digits as its factorization.

12665160509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 41.

The spelling of 12665160509 in words is "twelve billion, six hundred sixty-five million, one hundred sixty thousand, five hundred nine".