12665782273 has 2 divisors, whose sum is σ = 12665782274. Its totient is φ = 12665782272.

The previous prime is 12665782237. The next prime is 12665782307. The reversal of 12665782273 is 37228756621.

Together with previous prime (12665782237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12226167184 + 439615089 = 110572^2 + 20967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12665782273 is a prime.

It is not a weakly prime, because it can be changed into another prime (12665782673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332891136 + 6332891137.

It is an arithmetic number, because the mean of its divisors is an integer number (6332891137).

Almost surely, 2^12665782273 is an apocalyptic number.

It is an amenable number.

12665782273 is a deficient number, since it is larger than the sum of its proper divisors (1).

12665782273 is an equidigital number, since it uses as much as digits as its factorization.

12665782273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 49.

The spelling of 12665782273 in words is "twelve billion, six hundred sixty-five million, seven hundred eighty-two thousand, two hundred seventy-three".