6669839 has 16 divisors (see below), whose sum is σ = 7789824. Its totient is φ = 5649600.

The previous prime is 6669827. The next prime is 6669847. The reversal of 6669839 is 9389666.

It is not a de Polignac number, because 6669839 - 2¹⁶ = 6604303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6669793 and 6669802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669809) 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, 10052 + ... + 10694.

It is an arithmetic number, because the mean of its divisors is an integer number (486864).

Almost surely, 2^6669839 is an apocalyptic number.

6669839 is a deficient number, since it is larger than the sum of its proper divisors (1119985).

6669839 is a wasteful number, since it uses less digits than its factorization.

6669839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its digits is 419904, while the sum is 47.

The square root of 6669839 is about 2582.6031441164. The cubic root of 6669839 is about 188.2370538419.

The spelling of 6669839 in words is "six million, six hundred sixty-nine thousand, eight hundred thirty-nine".