6688339 has 4 divisors (see below), whose sum is σ = 7643824. Its totient is φ = 5732856.

The previous prime is 6688337. The next prime is 6688351. The reversal of 6688339 is 9338866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6688339 - 2¹ = 6688337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6688295 and 6688304.

It is not an unprimeable number, because it can be changed into a prime (6688337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477732 + ... + 477745.

It is an arithmetic number, because the mean of its divisors is an integer number (1910956).

Almost surely, 2^6688339 is an apocalyptic number.

6688339 is a deficient number, since it is larger than the sum of its proper divisors (955485).

6688339 is an equidigital number, since it uses as much as digits as its factorization.

6688339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955484.

The product of its digits is 186624, while the sum is 43.

The square root of 6688339 is about 2586.1823214924. The cubic root of 6688339 is about 188.4109296418.

The spelling of 6688339 in words is "six million, six hundred eighty-eight thousand, three hundred thirty-nine".