6556111 has 2 divisors, whose sum is σ = 6556112. Its totient is φ = 6556110.

The previous prime is 6556079. The next prime is 6556201. The reversal of 6556111 is 1116556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6556111 - 2⁵ = 6556079 is a prime.

6556111 is a lucky number.

It is equal to p₄₄₈₃₄₂ and since 6556111 and 448342 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6553111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278055 + 3278056.

It is an arithmetic number, because the mean of its divisors is an integer number (3278056).

Almost surely, 2^6556111 is an apocalyptic number.

6556111 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556111 is an equidigital number, since it uses as much as digits as its factorization.

6556111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 25.

The square root of 6556111 is about 2560.4903827197. The cubic root of 6556111 is about 187.1610326122.

The spelling of 6556111 in words is "six million, five hundred fifty-six thousand, one hundred eleven".