12566630677 has 2 divisors, whose sum is σ = 12566630678. Its totient is φ = 12566630676.

The previous prime is 12566630653. The next prime is 12566630683. The reversal of 12566630677 is 77603666521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12118927396 + 447703281 = 110086^2 + 21159^2 .

It is a cyclic number.

It is not a de Polignac number, because 12566630677 - 2²³ = 12558242069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12566630677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12566630477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283315338 + 6283315339.

It is an arithmetic number, because the mean of its divisors is an integer number (6283315339).

Almost surely, 2^12566630677 is an apocalyptic number.

It is an amenable number.

12566630677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12566630677 is an equidigital number, since it uses as much as digits as its factorization.

12566630677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 12566630677 in words is "twelve billion, five hundred sixty-six million, six hundred thirty thousand, six hundred seventy-seven".