6659729384 has 128 divisors (see below), whose sum is σ = 16010507520. Its totient is φ = 2521497600.

The previous prime is 6659729359. The next prime is 6659729393. The reversal of 6659729384 is 4839279566.

It is a super-2 number, since 2×6659729384² = 88703990936226038912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11541704 + ... + 11542280.

It is an arithmetic number, because the mean of its divisors is an integer number (125082090).

Almost surely, 2^6659729384 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 6659729384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8005253760).

6659729384 is an abundant number, since it is smaller than the sum of its proper divisors (9350778136).

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

6659729384 is a wasteful number, since it uses less digits than its factorization.

6659729384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1095 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 59.

The square root of 6659729384 is about 81607.1650285684. The cubic root of 6659729384 is about 1881.4190078969.

The spelling of 6659729384 in words is "six billion, six hundred fifty-nine million, seven hundred twenty-nine thousand, three hundred eighty-four".