2 Parts with 2 drops of glue: The base has a slightly flat top to allow for some bridging possibly hanging down from the interior of the ball. You may need to nip off a few pieces of that bringing. I twisted a drill bit by hand to clean up light stringing in the holes and/or maybe a touch with the torch.
PLA and PETG both came out good. I did use a brim for the ball part and no supports.
Note: I tried using supports for the inner top of the ball but the holes didn't like that.
The author hasn't provided the model origin yet.