680808068 has 12 divisors (see below), whose sum is σ = 1210945932. Its totient is φ = 334823520.

The previous prime is 680808043. The next prime is 680808071. The reversal of 680808068 is 860808086.

It can be written as a sum of positive squares in 2 ways, for example, as 352763524 + 328044544 = 18782^2 + 18112^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1394855 + ... + 1395342.

It is an arithmetic number, because the mean of its divisors is an integer number (100912161).

Almost surely, 2^680808068 is an apocalyptic number.

It is an amenable number.

680808068 is a deficient number, since it is larger than the sum of its proper divisors (530137864).

680808068 is a wasteful number, since it uses less digits than its factorization.

680808068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790262 (or 2790260 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 680808068 is about 26092.2990171430. The cubic root of 680808068 is about 879.7141237383.

The spelling of 680808068 in words is "six hundred eighty million, eight hundred eight thousand, sixty-eight".