6611491 has 2 divisors, whose sum is σ = 6611492. Its totient is φ = 6611490.

The previous prime is 6611489. The next prime is 6611497. The reversal of 6611491 is 1941166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6611491 - 2¹ = 6611489 is a prime.

Together with 6611489, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6611497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305745 + 3305746.

It is an arithmetic number, because the mean of its divisors is an integer number (3305746).

Almost surely, 2^6611491 is an apocalyptic number.

6611491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611491 is an equidigital number, since it uses as much as digits as its factorization.

6611491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 6611491 is about 2571.2819759801. The cubic root of 6611491 is about 187.6865438274.

The spelling of 6611491 in words is "six million, six hundred eleven thousand, four hundred ninety-one".