6680721522680 has 128 divisors (see below), whose sum is σ = 15733033989120. Its totient is φ = 2548313349120.

The previous prime is 6680721522637. The next prime is 6680721522733. The reversal of 6680721522680 is 862251270866.

It is a hoax number, since the sum of its digits (53) 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 (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480171404 + ... + 480185316.

It is an arithmetic number, because the mean of its divisors is an integer number (122914328040).

Almost surely, 2^{6680721522680} 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 6680721522680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7866516994560).

6680721522680 is an abundant number, since it is smaller than the sum of its proper divisors (9052312466440).

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

6680721522680 is a wasteful number, since it uses less digits than its factorization.

6680721522680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15501 (or 15497 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 6680721522680 in words is "six trillion, six hundred eighty billion, seven hundred twenty-one million, five hundred twenty-two thousand, six hundred eighty".