680777807 has 2 divisors, whose sum is σ = 680777808. Its totient is φ = 680777806.

The previous prime is 680777791. The next prime is 680777827. The reversal of 680777807 is 708777086.

680777807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680777807 - 2⁴ = 680777791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680777827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340388903 + 340388904.

It is an arithmetic number, because the mean of its divisors is an integer number (340388904).

Almost surely, 2^680777807 is an apocalyptic number.

680777807 is a deficient number, since it is larger than the sum of its proper divisors (1).

680777807 is an equidigital number, since it uses as much as digits as its factorization.

680777807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921984, while the sum is 50.

The square root of 680777807 is about 26091.7191269567. The cubic root of 680777807 is about 879.7010895099.

The spelling of 680777807 in words is "six hundred eighty million, seven hundred seventy-seven thousand, eight hundred seven".