680672343870 has 80 divisors (see below), whose sum is σ = 1832116350240. Its totient is φ = 181327761216.

The previous prime is 680672343851. The next prime is 680672343881. The reversal of 680672343870 is 78343276086.

680672343870 is a `hidden beast` number, since 6 + 80 + 67 + 2 + 3 + 438 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 368796 + ... + 1223664.

It is an arithmetic number, because the mean of its divisors is an integer number (22901454378).

Almost surely, 2^680672343870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680672343870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916058175120).

680672343870 is an abundant number, since it is smaller than the sum of its proper divisors (1151444006370).

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

680672343870 is a wasteful number, since it uses less digits than its factorization.

680672343870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855871 (or 855862 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 680672343870 in words is "six hundred eighty billion, six hundred seventy-two million, three hundred forty-three thousand, eight hundred seventy".