12805166687 has 2 divisors, whose sum is σ = 12805166688. Its totient is φ = 12805166686.

The previous prime is 12805166681. The next prime is 12805166713. The reversal of 12805166687 is 78666150821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12805166687 - 2⁶ = 12805166623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12805166681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402583343 + 6402583344.

It is an arithmetic number, because the mean of its divisors is an integer number (6402583344).

Almost surely, 2^12805166687 is an apocalyptic number.

12805166687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12805166687 is an equidigital number, since it uses as much as digits as its factorization.

12805166687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 12805166687 in words is "twelve billion, eight hundred five million, one hundred sixty-six thousand, six hundred eighty-seven".