680899221984 has 96 divisors (see below), whose sum is σ = 1808355780000. Its totient is φ = 224302915584.

The previous prime is 680899221949. The next prime is 680899222007. The reversal of 680899221984 is 489122998086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17829342 + ... + 17867490.

It is an arithmetic number, because the mean of its divisors is an integer number (18837039375).

Almost surely, 2^680899221984 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 680899221984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904177890000).

680899221984 is an abundant number, since it is smaller than the sum of its proper divisors (1127456558016).

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

680899221984 is a wasteful number, since it uses less digits than its factorization.

680899221984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40340 (or 40332 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 66.

The spelling of 680899221984 in words is "six hundred eighty billion, eight hundred ninety-nine million, two hundred twenty-one thousand, nine hundred eighty-four".