6668433426816 has 256 divisors, whose sum is σ = 22589286220800. Its totient is φ = 1897087979520.

The previous prime is 6668433426799. The next prime is 6668433426827. The reversal of 6668433426816 is 6186243348666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5045221 + ... + 6228251.

It is an arithmetic number, because the mean of its divisors is an integer number (88239399300).

Almost surely, 2^{6668433426816} 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 6668433426816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11294643110400).

6668433426816 is an abundant number, since it is smaller than the sum of its proper divisors (15920852793984).

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

6668433426816 is a wasteful number, since it uses less digits than its factorization.

6668433426816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183294 (or 1183276 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 63.

The spelling of 6668433426816 in words is "six trillion, six hundred sixty-eight billion, four hundred thirty-three million, four hundred twenty-six thousand, eight hundred sixteen".