6556191 has 8 divisors (see below), whose sum is σ = 8770944. Its totient is φ = 4356120.

The previous prime is 6556111. The next prime is 6556201. The reversal of 6556191 is 1916556.

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

It is not a de Polignac number, because 6556191 - 2⁷ = 6556063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556111) 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, 2581 + ... + 4446.

It is an arithmetic number, because the mean of its divisors is an integer number (1096368).

Almost surely, 2^6556191 is an apocalyptic number.

6556191 is a deficient number, since it is larger than the sum of its proper divisors (2214753).

6556191 is a wasteful number, since it uses less digits than its factorization.

6556191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7341.

The product of its digits is 8100, while the sum is 33.

The square root of 6556191 is about 2560.5060046795. The cubic root of 6556191 is about 187.1617938776.

The spelling of 6556191 in words is "six million, five hundred fifty-six thousand, one hundred ninety-one".