680866808 has 8 divisors (see below), whose sum is σ = 1276625280. Its totient is φ = 340433400.

The previous prime is 680866807. The next prime is 680866817. The reversal of 680866808 is 808668086.

680866808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×680866808² = 927159220472217728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680866807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42554168 + ... + 42554183.

It is an arithmetic number, because the mean of its divisors is an integer number (159578160).

Almost surely, 2^680866808 is an apocalyptic number.

It is an amenable number.

680866808 is a deficient number, since it is larger than the sum of its proper divisors (595758472).

680866808 is a wasteful number, since it uses less digits than its factorization.

680866808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85108357 (or 85108353 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The square root of 680866808 is about 26093.4246123425. The cubic root of 680866808 is about 879.7394235371.

The spelling of 680866808 in words is "six hundred eighty million, eight hundred sixty-six thousand, eight hundred eight".