6556839 has 8 divisors (see below), whose sum is σ = 8788992. Its totient is φ = 4347960.

The previous prime is 6556831. The next prime is 6556861. The reversal of 6556839 is 9386556.

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

It is not a de Polignac number, because 6556839 - 2³ = 6556831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6556839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5149 + ... + 6294.

It is an arithmetic number, because the mean of its divisors is an integer number (1098624).

Almost surely, 2^6556839 is an apocalyptic number.

6556839 is a deficient number, since it is larger than the sum of its proper divisors (2232153).

6556839 is a wasteful number, since it uses less digits than its factorization.

6556839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11637.

The product of its digits is 194400, while the sum is 42.

The square root of 6556839 is about 2560.6325390419. The cubic root of 6556839 is about 187.1679598993.

The spelling of 6556839 in words is "six million, five hundred fifty-six thousand, eight hundred thirty-nine".