1266412815683 has 2 divisors, whose sum is σ = 1266412815684. Its totient is φ = 1266412815682.

The previous prime is 1266412815659. The next prime is 1266412815713. The reversal of 1266412815683 is 3865182146621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266412815683 - 2¹⁰ = 1266412814659 is a prime.

It is a super-2 number, since 2×1266412815683² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1266412815623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633206407841 + 633206407842.

It is an arithmetic number, because the mean of its divisors is an integer number (633206407842).

Almost surely, 2^{1266412815683} is an apocalyptic number.

1266412815683 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266412815683 is an equidigital number, since it uses as much as digits as its factorization.

1266412815683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 53.

The spelling of 1266412815683 in words is "one trillion, two hundred sixty-six billion, four hundred twelve million, eight hundred fifteen thousand, six hundred eighty-three".