6663909312 has 224 divisors, whose sum is σ = 20072908800. Its totient is φ = 2167382016.

The previous prime is 6663909289. The next prime is 6663909313. The reversal of 6663909312 is 2139093666.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663909313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13911889 + ... + 13912367.

It is an arithmetic number, because the mean of its divisors is an integer number (89611200).

Almost surely, 2^6663909312 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 6663909312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10036454400).

6663909312 is an abundant number, since it is smaller than the sum of its proper divisors (13408999488).

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

6663909312 is a wasteful number, since it uses less digits than its factorization.

6663909312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 6663909312 is about 81632.7710665270. The cubic root of 6663909312 is about 1881.8125449718.

The spelling of 6663909312 in words is "six billion, six hundred sixty-three million, nine hundred nine thousand, three hundred twelve".