6636664839168 has 528 divisors, whose sum is σ = 23622367554240. Its totient is φ = 1747594248192.

The previous prime is 6636664839139. The next prime is 6636664839193. The reversal of 6636664839168 is 8619384666366.

It is a Harshad number since it is a multiple of its sum of digits (72).

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

It is a junction number, because it is equal to n+sod(n) for n = 6636664839096 and 6636664839105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 567764268 + ... + 567775956.

Almost surely, 2^{6636664839168} 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 6636664839168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11811183777120).

6636664839168 is an abundant number, since it is smaller than the sum of its proper divisors (16985702715072).

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

6636664839168 is a wasteful number, since it uses less digits than its factorization.

6636664839168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12412 (or 12391 counting only the distinct ones).

The product of its digits is 967458816, while the sum is 72.

The spelling of 6636664839168 in words is "six trillion, six hundred thirty-six billion, six hundred sixty-four million, eight hundred thirty-nine thousand, one hundred sixty-eight".