2217620663 has 4 divisors (see below), whose sum is σ = 2334337560. Its totient is φ = 2100903768.

The previous prime is 2217620659. The next prime is 2217620687. The reversal of 2217620663 is 3660267122.

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 2217620663 - 2² = 2217620659 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 (2217620623) 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, 58358420 + ... + 58358457.

It is an arithmetic number, because the mean of its divisors is an integer number (583584390).

Almost surely, 2^2217620663 is an apocalyptic number.

2217620663 is a deficient number, since it is larger than the sum of its proper divisors (116716897).

2217620663 is a wasteful number, since it uses less digits than its factorization.

2217620663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116716896.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 2217620663 is about 47091.6198808238. The cubic root of 2217620663 is about 1304.0545331978.

Adding to 2217620663 its reverse (3660267122), we get a palindrome (5877887785).

The spelling of 2217620663 in words is "two billion, two hundred seventeen million, six hundred twenty thousand, six hundred sixty-three".