866786274780313 has 2 divisors, whose sum is σ = 866786274780314. Its totient is φ = 866786274780312.

The previous prime is 866786274780269. The next prime is 866786274780509. The reversal of 866786274780313 is 313087472687668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 835929938477209 + 30856336303104 = 28912453^2 + 5554848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866786274780313 is a prime.

It is a super-2 number, since 2×866786274780313² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866786274780313.

It is not a weakly prime, because it can be changed into another prime (866786274783313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393137390156 + 433393137390157.

It is an arithmetic number, because the mean of its divisors is an integer number (433393137390157).

Almost surely, 2^{866786274780313} is an apocalyptic number.

It is an amenable number.

866786274780313 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786274780313 is an equidigital number, since it uses as much as digits as its factorization.

866786274780313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2731180032, while the sum is 76.

The spelling of 866786274780313 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-four million, seven hundred eighty thousand, three hundred thirteen".