11660191 has 2 divisors, whose sum is σ = 11660192. Its totient is φ = 11660190.

The previous prime is 11660177. The next prime is 11660197. The reversal of 11660191 is 19106611.

It is a strong prime.

It is an emirp because it is prime and its reverse (19106611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11660191 - 2²¹ = 9563039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11660197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830095 + 5830096.

It is an arithmetic number, because the mean of its divisors is an integer number (5830096).

Almost surely, 2^11660191 is an apocalyptic number.

11660191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660191 is an equidigital number, since it uses as much as digits as its factorization.

11660191 is an evil number, because the sum of its binary digits is even.

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

The square root of 11660191 is about 3414.7021832072. The cubic root of 11660191 is about 226.7610998773.

The spelling of 11660191 in words is "eleven million, six hundred sixty thousand, one hundred ninety-one".