680863716 has 72 divisors (see below), whose sum is σ = 1861849080. Its totient is φ = 208548864.

The previous prime is 680863709. The next prime is 680863739. The reversal of 680863716 is 617368086.

680863716 is a `hidden beast` number, since 6 + 8 + 0 + 8 + 637 + 1 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 122014116 + 558849600 = 11046^2 + 23640^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103996 + ... + 110348.

It is an arithmetic number, because the mean of its divisors is an integer number (25859015).

Almost surely, 2^680863716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680863716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930924540).

680863716 is an abundant number, since it is smaller than the sum of its proper divisors (1180985364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680863716 is a wasteful number, since it uses less digits than its factorization.

680863716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605 (or 6600 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 680863716 is about 26093.3653636322. The cubic root of 680863716 is about 879.7380918237.

The spelling of 680863716 in words is "six hundred eighty million, eight hundred sixty-three thousand, seven hundred sixteen".