5666191 has 2 divisors, whose sum is σ = 5666192. Its totient is φ = 5666190.

The previous prime is 5666189. The next prime is 5666197. The reversal of 5666191 is 1916665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5666191 - 2¹ = 5666189 is a prime.

Together with 5666189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5666197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2833095 + 2833096.

It is an arithmetic number, because the mean of its divisors is an integer number (2833096).

Almost surely, 2^5666191 is an apocalyptic number.

5666191 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666191 is an equidigital number, since it uses as much as digits as its factorization.

5666191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The square root of 5666191 is about 2380.3762307669. The cubic root of 5666191 is about 178.2777194816.

The spelling of 5666191 in words is "five million, six hundred sixty-six thousand, one hundred ninety-one".