6639229824 has 64 divisors (see below), whose sum is σ = 18204372480. Its totient is φ = 2141683200.

The previous prime is 6639229771. The next prime is 6639229829. The reversal of 6639229824 is 4289229366.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639229829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266962 + ... + 290769.

It is an arithmetic number, because the mean of its divisors is an integer number (284443320).

Almost surely, 2^6639229824 is an apocalyptic number.

6639229824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6639229824 is an abundant number, since it is smaller than the sum of its proper divisors (11565142656).

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

6639229824 is a wasteful number, since it uses less digits than its factorization.

6639229824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557779 (or 557767 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 51.

The square root of 6639229824 is about 81481.4692061944. The cubic root of 6639229824 is about 1879.4866019275.

The spelling of 6639229824 in words is "six billion, six hundred thirty-nine million, two hundred twenty-nine thousand, eight hundred twenty-four".