6611191 has 2 divisors, whose sum is σ = 6611192. Its totient is φ = 6611190.

The previous prime is 6611179. The next prime is 6611219. The reversal of 6611191 is 1911166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6611191 - 2¹⁹ = 6086903 is a prime.

6611191 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305595 + 3305596.

It is an arithmetic number, because the mean of its divisors is an integer number (3305596).

Almost surely, 2^6611191 is an apocalyptic number.

6611191 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611191 is an equidigital number, since it uses as much as digits as its factorization.

6611191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 25.

The square root of 6611191 is about 2571.2236386592. The cubic root of 6611191 is about 187.6837049915.

Subtracting from 6611191 its sum of digits (25), we obtain a palindrome (6611166).

The spelling of 6611191 in words is "six million, six hundred eleven thousand, one hundred ninety-one".