6639360000 has 960 divisors, whose sum is σ = 28655827200. Its totient is φ = 1327104000.

The previous prime is 6639359989. The next prime is 6639360017. The reversal of 6639360000 is 639366.

It is a tau number, because it is divible by the number of its divisors (960).

It is a super-2 number, since 2×6639360000² = 88162202419200000000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 349439991 + ... + 349440009.

It is an arithmetic number, because the mean of its divisors is an integer number (29849820).

Almost surely, 2^6639360000 is an apocalyptic number.

6639360000 is a gapful number since it is divisible by the number (60) 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 6639360000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14327913600).

6639360000 is an abundant number, since it is smaller than the sum of its proper divisors (22016467200).

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

6639360000 is a wasteful number, since it uses less digits than its factorization.

6639360000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 6639360000 is about 81482.2680096719. The cubic root of 6639360000 is about 1879.4988856037.

Adding to 6639360000 its reverse (639366), we get a palindrome (6639999366).

The spelling of 6639360000 in words is "six billion, six hundred thirty-nine million, three hundred sixty thousand".