6611891 has 8 divisors (see below), whose sum is σ = 7767984. Its totient is φ = 5548320.

The previous prime is 6611881. The next prime is 6611893. The reversal of 6611891 is 1981166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6611891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6611893) 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 in 7 ways as a sum of consecutive naturals, for example, 22976 + ... + 23261.

It is an arithmetic number, because the mean of its divisors is an integer number (970998).

Almost surely, 2^6611891 is an apocalyptic number.

6611891 is a deficient number, since it is larger than the sum of its proper divisors (1156093).

6611891 is a wasteful number, since it uses less digits than its factorization.

6611891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46261.

The product of its digits is 2592, while the sum is 32.

The square root of 6611891 is about 2571.3597570157. The cubic root of 6611891 is about 187.6903288084.

It can be divided in two parts, 661 and 1891, that added together give a palindrome (2552).

The spelling of 6611891 in words is "six million, six hundred eleven thousand, eight hundred ninety-one".