6621313338880 has 80 divisors (see below), whose sum is σ = 15881234879664. Its totient is φ = 2647590830080.

The previous prime is 6621313338853. The next prime is 6621313338883. The reversal of 6621313338880 is 888333131266.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6621313338883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6823200 + ... + 7732960.

Almost surely, 2^{6621313338880} 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 6621313338880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7940617439832).

6621313338880 is an abundant number, since it is smaller than the sum of its proper divisors (9259921540784).

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

6621313338880 is an equidigital number, since it uses as much as digits as its factorization.

6621313338880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912627 (or 912611 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 6621313338880 in words is "six trillion, six hundred twenty-one billion, three hundred thirteen million, three hundred thirty-eight thousand, eight hundred eighty".