1266979862413 has 2 divisors, whose sum is σ = 1266979862414. Its totient is φ = 1266979862412.

The previous prime is 1266979862363. The next prime is 1266979862431. The reversal of 1266979862413 is 3142689796621.

Together with next prime (1266979862431) 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., 1266979862404 + 9 = 1125602^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266979862413 - 2²⁵ = 1266946307981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266979862443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633489931206 + 633489931207.

It is an arithmetic number, because the mean of its divisors is an integer number (633489931207).

Almost surely, 2^{1266979862413} is an apocalyptic number.

It is an amenable number.

1266979862413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266979862413 is an equidigital number, since it uses as much as digits as its factorization.

1266979862413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 64.

The spelling of 1266979862413 in words is "one trillion, two hundred sixty-six billion, nine hundred seventy-nine million, eight hundred sixty-two thousand, four hundred thirteen".