What is stars 667?

As an AI language model, I don't have access to the specific context you are referring to; however, I can give you general information about stars "667".

There is no known star with the designation "667." Stars are typically identified using a combination of catalog names and numbers, as well as unique identifiers based on their celestial coordinates.

However, if you are referring to the term "667" in another context, please provide additional information, and I will do my best to provide you with relevant information.