6664744981824 has 112 divisors (see below), whose sum is σ = 18145983926400. Its totient is φ = 2157291104256.

The previous prime is 6664744981757. The next prime is 6664744981859. The reversal of 6664744981824 is 4281894474666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694357 + ... + 4537515.

Almost surely, 2^{6664744981824} is an apocalyptic number.

6664744981824 is a gapful number since it is divisible by the number (64) 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 6664744981824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9072991963200).

6664744981824 is an abundant number, since it is smaller than the sum of its proper divisors (11481238944576).

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

6664744981824 is a wasteful number, since it uses less digits than its factorization.

6664744981824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843720 (or 1843710 counting only the distinct ones).

The product of its digits is 445906944, while the sum is 69.

The spelling of 6664744981824 in words is "six trillion, six hundred sixty-four billion, seven hundred forty-four million, nine hundred eighty-one thousand, eight hundred twenty-four".