2117065663 has 4 divisors (see below), whose sum is σ = 2117157768. Its totient is φ = 2116973560.

The previous prime is 2117065651. The next prime is 2117065669. The reversal of 2117065663 is 3665607112.

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.

It is a cyclic number.

It is not a de Polignac number, because 2117065663 - 2⁹ = 2117065151 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 (2117065669) 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, 20133 + ... + 68113.

It is an arithmetic number, because the mean of its divisors is an integer number (529289442).

Almost surely, 2^2117065663 is an apocalyptic number.

2117065663 is a deficient number, since it is larger than the sum of its proper divisors (92105).

2117065663 is an equidigital number, since it uses as much as digits as its factorization.

2117065663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92104.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 2117065663 is about 46011.5818354466. The cubic root of 2117065663 is about 1284.0386887328.

The spelling of 2117065663 in words is "two billion, one hundred seventeen million, sixty-five thousand, six hundred sixty-three".