680771684 has 12 divisors (see below), whose sum is σ = 1191579900. Its totient is φ = 340320288.

The previous prime is 680771683. The next prime is 680771699. The reversal of 680771684 is 486177086.

It can be written as a sum of positive squares in 2 ways, for example, as 44622400 + 636149284 = 6680^2 + 25222^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (680771683) 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 3 ways as a sum of consecutive naturals, for example, 12722 + ... + 39030.

It is an arithmetic number, because the mean of its divisors is an integer number (99298325).

Almost surely, 2^680771684 is an apocalyptic number.

It is an amenable number.

680771684 is a deficient number, since it is larger than the sum of its proper divisors (510808216).

680771684 is a wasteful number, since it uses less digits than its factorization.

680771684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32782 (or 32780 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 680771684 is about 26091.6017906145. The cubic root of 680771684 is about 879.6984521218.

The spelling of 680771684 in words is "six hundred eighty million, seven hundred seventy-one thousand, six hundred eighty-four".