6639339898 has 8 divisors (see below), whose sum is σ = 10483168320. Its totient is φ = 3144950460.

The previous prime is 6639339887. The next prime is 6639339911. The reversal of 6639339898 is 8989339366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87359698 + ... + 87359773.

It is an arithmetic number, because the mean of its divisors is an integer number (1310396040).

Almost surely, 2^6639339898 is an apocalyptic number.

6639339898 is a deficient number, since it is larger than the sum of its proper divisors (3843828422).

6639339898 is a wasteful number, since it uses less digits than its factorization.

6639339898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174719492.

The product of its digits is 45349632, while the sum is 64.

The square root of 6639339898 is about 81482.1446575874. The cubic root of 6639339898 is about 1879.4969887480.

The spelling of 6639339898 in words is "six billion, six hundred thirty-nine million, three hundred thirty-nine thousand, eight hundred ninety-eight".