6691839 has 32 divisors (see below), whose sum is σ = 11335680. Its totient is φ = 3410400.

The previous prime is 6691801. The next prime is 6691843. The reversal of 6691839 is 9381966.

It is not a de Polignac number, because 6691839 - 2¹¹ = 6689791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6691839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13384 + ... + 13874.

It is an arithmetic number, because the mean of its divisors is an integer number (354240).

Almost surely, 2^6691839 is an apocalyptic number.

6691839 is a deficient number, since it is larger than the sum of its proper divisors (4643841).

6691839 is a wasteful number, since it uses less digits than its factorization.

6691839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571.

The product of its digits is 69984, while the sum is 42.

The square root of 6691839 is about 2586.8589060867. The cubic root of 6691839 is about 188.4437889840.

The spelling of 6691839 in words is "six million, six hundred ninety-one thousand, eight hundred thirty-nine".