163566668217 has 8 divisors (see below), whose sum is σ = 218223603360. Its totient is φ = 108977089280.

The previous prime is 163566668159. The next prime is 163566668267. The reversal of 163566668217 is 712866665361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163566668217 - 2¹¹ = 163566666169 is a prime.

It is a super-2 number, since 2×163566668217² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163566668267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16833384 + ... + 16843097.

It is an arithmetic number, because the mean of its divisors is an integer number (27277950420).

Almost surely, 2^163566668217 is an apocalyptic number.

It is an amenable number.

163566668217 is a deficient number, since it is larger than the sum of its proper divisors (54656935143).

163566668217 is a wasteful number, since it uses less digits than its factorization.

163566668217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33678103.

The product of its digits is 13063680, while the sum is 57.

The spelling of 163566668217 in words is "one hundred sixty-three billion, five hundred sixty-six million, six hundred sixty-eight thousand, two hundred seventeen".