680809708771 has 2 divisors, whose sum is σ = 680809708772. Its totient is φ = 680809708770.

The previous prime is 680809708757. The next prime is 680809708819. The reversal of 680809708771 is 177807908086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680809708771 - 2⁷ = 680809708643 is a prime.

It is not a weakly prime, because it can be changed into another prime (680809708741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340404854385 + 340404854386.

It is an arithmetic number, because the mean of its divisors is an integer number (340404854386).

Almost surely, 2^680809708771 is an apocalyptic number.

680809708771 is a deficient number, since it is larger than the sum of its proper divisors (1).

680809708771 is an equidigital number, since it uses as much as digits as its factorization.

680809708771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9483264, while the sum is 61.

The spelling of 680809708771 in words is "six hundred eighty billion, eight hundred nine million, seven hundred eight thousand, seven hundred seventy-one".