11816663 has 4 divisors (see below), whose sum is σ = 11823888. Its totient is φ = 11809440.

The previous prime is 11816657. The next prime is 11816669. The reversal of 11816663 is 36661811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 36661811 = 19 ⋅1929569.

It is an interprime number because it is at equal distance from previous prime (11816657) and next prime (11816669).

It is a cyclic number.

It is not a de Polignac number, because 11816663 - 2⁴ = 11816647 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 (11816669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 4863.

It is an arithmetic number, because the mean of its divisors is an integer number (2955972).

Almost surely, 2^11816663 is an apocalyptic number.

11816663 is a deficient number, since it is larger than the sum of its proper divisors (7225).

11816663 is an equidigital number, since it uses as much as digits as its factorization.

11816663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7224.

The product of its digits is 5184, while the sum is 32.

The square root of 11816663 is about 3437.5373452517. The cubic root of 11816663 is about 227.7709238645.

The spelling of 11816663 in words is "eleven million, eight hundred sixteen thousand, six hundred sixty-three".