680444107866 has 12 divisors (see below), whose sum is σ = 1474295567082. Its totient is φ = 226814702616.

The previous prime is 680444107853. The next prime is 680444107907. The reversal of 680444107866 is 668701444086.

680444107866 is a `hidden beast` number, since 68 + 0 + 44 + 410 + 78 + 66 = 666.

680444107866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 640673777241 + 39770330625 = 800421^2 + 199425^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18901225201 + ... + 18901225236.

Almost surely, 2^680444107866 is an apocalyptic number.

680444107866 is an abundant number, since it is smaller than the sum of its proper divisors (793851459216).

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

680444107866 is a wasteful number, since it uses less digits than its factorization.

680444107866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37802450445 (or 37802450442 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 680444107866 in words is "six hundred eighty billion, four hundred forty-four million, one hundred seven thousand, eight hundred sixty-six".