680663085606 has 48 divisors (see below), whose sum is σ = 1685813126400. Its totient is φ = 194433435504.

The previous prime is 680663085581. The next prime is 680663085649. The reversal of 680663085606 is 606580366086.

It is a super-2 number, since 2×680663085606² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 12285 + ... + 1166823.

It is an arithmetic number, because the mean of its divisors is an integer number (35121106800).

Almost surely, 2^680663085606 is an apocalyptic number.

680663085606 is an abundant number, since it is smaller than the sum of its proper divisors (1005150040794).

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

680663085606 is a wasteful number, since it uses less digits than its factorization.

680663085606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159233 (or 1159230 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 680663085606 in words is "six hundred eighty billion, six hundred sixty-three million, eighty-five thousand, six hundred six".