6557111 has 12 divisors (see below), whose sum is σ = 7367136. Its totient is φ = 5829120.

The previous prime is 6557101. The next prime is 6557123. The reversal of 6557111 is 1117556.

6557111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6557111 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 (6557101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5111 + ... + 6263.

It is an arithmetic number, because the mean of its divisors is an integer number (613928).

Almost surely, 2^6557111 is an apocalyptic number.

6557111 is a deficient number, since it is larger than the sum of its proper divisors (810025).

6557111 is a wasteful number, since it uses less digits than its factorization.

6557111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222 (or 1211 counting only the distinct ones).

The product of its digits is 1050, while the sum is 26.

The square root of 6557111 is about 2560.6856503679. The cubic root of 6557111 is about 187.1705479849.

The spelling of 6557111 in words is "six million, five hundred fifty-seven thousand, one hundred eleven".