6636378672 has 720 divisors, whose sum is σ = 26129875200. Its totient is φ = 1522851840.

The previous prime is 6636378659. The next prime is 6636378731. The reversal of 6636378672 is 2768736366.

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

Its product of digits (9144576) is a multiple of the sum of its prime divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 60884154 + ... + 60884262.

Almost surely, 2^6636378672 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 6636378672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13064937600).

6636378672 is an abundant number, since it is smaller than the sum of its proper divisors (19493496528).

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

6636378672 is a wasteful number, since it uses less digits than its factorization.

6636378672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 168 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The square root of 6636378672 is about 81463.9716193607. The cubic root of 6636378672 is about 1879.2175210557.

The spelling of 6636378672 in words is "six billion, six hundred thirty-six million, three hundred seventy-eight thousand, six hundred seventy-two".