680805777 has 16 divisors (see below), whose sum is σ = 956072000. Its totient is φ = 429732864.

The previous prime is 680805721. The next prime is 680805803. The reversal of 680805777 is 777508086.

It is not a de Polignac number, because 680805777 - 2⁷ = 680805649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680805277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178749 + ... + 182517.

It is an arithmetic number, because the mean of its divisors is an integer number (59754500).

Almost surely, 2^680805777 is an apocalyptic number.

It is an amenable number.

680805777 is a deficient number, since it is larger than the sum of its proper divisors (275266223).

680805777 is a wasteful number, since it uses less digits than its factorization.

680805777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 680805777 is about 26092.2551152636. The cubic root of 680805777 is about 879.7131369563.

The spelling of 680805777 in words is "six hundred eighty million, eight hundred five thousand, seven hundred seventy-seven".