11165663 has 4 divisors (see below), whose sum is σ = 11234328. Its totient is φ = 11097000.

The previous prime is 11165659. The next prime is 11165677. The reversal of 11165663 is 36656111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11165663 - 2² = 11165659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11165263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34088 + ... + 34413.

It is an arithmetic number, because the mean of its divisors is an integer number (2808582).

Almost surely, 2^11165663 is an apocalyptic number.

11165663 is a deficient number, since it is larger than the sum of its proper divisors (68665).

11165663 is an equidigital number, since it uses as much as digits as its factorization.

11165663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68664.

The product of its digits is 3240, while the sum is 29.

The square root of 11165663 is about 3341.5060975554. The cubic root of 11165663 is about 223.5089089866.

The spelling of 11165663 in words is "eleven million, one hundred sixty-five thousand, six hundred sixty-three".