6639008384 has 16 divisors (see below), whose sum is σ = 13226149770. Its totient is φ = 3319504128.

The previous prime is 6639008339. The next prime is 6639008407. The reversal of 6639008384 is 4838009366.

It can be written as a sum of positive squares in only one way, i.e., 5252190784 + 1386817600 = 72472^2 + 37240^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25933499 + ... + 25933754.

Almost surely, 2^6639008384 is an apocalyptic number.

6639008384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6639008384 is a deficient number, since it is larger than the sum of its proper divisors (6587141386).

6639008384 is an equidigital number, since it uses as much as digits as its factorization.

6639008384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51867267 (or 51867255 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 6639008384 is about 81480.1103582954. The cubic root of 6639008384 is about 1879.4657060228.

The spelling of 6639008384 in words is "six billion, six hundred thirty-nine million, eight thousand, three hundred eighty-four".