680866666405 has 8 divisors (see below), whose sum is σ = 817133760000. Its totient is φ = 544630826256.

The previous prime is 680866666327. The next prime is 680866666517. The reversal of 680866666405 is 504666668086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 680866666405 - 2³³ = 672276731813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7765405 + ... + 7852594.

It is an arithmetic number, because the mean of its divisors is an integer number (102141720000).

Almost surely, 2^680866666405 is an apocalyptic number.

It is an amenable number.

680866666405 is a deficient number, since it is larger than the sum of its proper divisors (136267093595).

680866666405 is a wasteful number, since it uses less digits than its factorization.

680866666405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15626723.

The product of its (nonzero) digits is 59719680, while the sum is 61.

The spelling of 680866666405 in words is "six hundred eighty billion, eight hundred sixty-six million, six hundred sixty-six thousand, four hundred five".