6557959 has 4 divisors (see below), whose sum is σ = 6581416. Its totient is φ = 6534504.

The previous prime is 6557939. The next prime is 6557963. The reversal of 6557959 is 9597556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6557959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6557939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11304 + ... + 11869.

It is an arithmetic number, because the mean of its divisors is an integer number (1645354).

Almost surely, 2^6557959 is an apocalyptic number.

6557959 is a deficient number, since it is larger than the sum of its proper divisors (23457).

6557959 is a wasteful number, since it uses less digits than its factorization.

6557959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23456.

The product of its digits is 425250, while the sum is 46.

The square root of 6557959 is about 2560.8512256670. The cubic root of 6557959 is about 187.1786162629.

The spelling of 6557959 in words is "six million, five hundred fifty-seven thousand, nine hundred fifty-nine".