6639339 has 16 divisors (see below), whose sum is σ = 10153728. Its totient is φ = 3780192.

The previous prime is 6639337. The next prime is 6639349. The reversal of 6639339 is 9339366.

It is not a de Polignac number, because 6639339 - 2¹ = 6639337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6639297 and 6639306.

It is not an unprimeable number, because it can be changed into a prime (6639331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9469 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (634608).

Almost surely, 2^6639339 is an apocalyptic number.

6639339 is a deficient number, since it is larger than the sum of its proper divisors (3514389).

6639339 is a wasteful number, since it uses less digits than its factorization.

6639339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 78732, while the sum is 39.

The square root of 6639339 is about 2576.6914832785. The cubic root of 6639339 is about 187.9496904011.

The spelling of 6639339 in words is "six million, six hundred thirty-nine thousand, three hundred thirty-nine".