6659934720 has 160 divisors (see below), whose sum is σ = 22412047680. Its totient is φ = 1682472960.

The previous prime is 6659934713. The next prime is 6659934761. The reversal of 6659934720 is 274399566.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×6659934720² = 88709460949322956800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 123100 + ... + 168740.

It is an arithmetic number, because the mean of its divisors is an integer number (140075298).

Almost surely, 2^6659934720 is an apocalyptic number.

6659934720 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 6659934720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11206023840).

6659934720 is an abundant number, since it is smaller than the sum of its proper divisors (15752112960).

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

6659934720 is a wasteful number, since it uses less digits than its factorization.

6659934720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45686 (or 45670 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 51.

The square root of 6659934720 is about 81608.4230946782. The cubic root of 6659934720 is about 1881.4383439720.

The spelling of 6659934720 in words is "six billion, six hundred fifty-nine million, nine hundred thirty-four thousand, seven hundred twenty".