12665777239 has 2 divisors, whose sum is σ = 12665777240. Its totient is φ = 12665777238.

The previous prime is 12665777191. The next prime is 12665777297. The reversal of 12665777239 is 93277756621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12665777239 - 2³³ = 4075842647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12665777239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12665777039) 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, 6332888619 + 6332888620.

It is an arithmetic number, because the mean of its divisors is an integer number (6332888620).

Almost surely, 2^12665777239 is an apocalyptic number.

12665777239 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665777239 is an equidigital number, since it uses as much as digits as its factorization.

12665777239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6667920, while the sum is 55.

The spelling of 12665777239 in words is "twelve billion, six hundred sixty-five million, seven hundred seventy-seven thousand, two hundred thirty-nine".