6684943680 has 168 divisors, whose sum is σ = 23160228000. Its totient is φ = 1769720832.

The previous prime is 6684943651. The next prime is 6684943691. The reversal of 6684943680 is 863494866.

It is a hoax number, since the sum of its digits (54) 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391971 + ... + 408669.

It is an arithmetic number, because the mean of its divisors is an integer number (137858500).

Almost surely, 2^6684943680 is an apocalyptic number.

6684943680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6684943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11580114000).

6684943680 is an abundant number, since it is smaller than the sum of its proper divisors (16475284320).

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

6684943680 is a wasteful number, since it uses less digits than its factorization.

6684943680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16861 (or 16848 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 6684943680 is about 81761.5048785185. The cubic root of 6684943680 is about 1883.7904211946.

The spelling of 6684943680 in words is "six billion, six hundred eighty-four million, nine hundred forty-three thousand, six hundred eighty".