Well, there's no set number. Epilogues can range from as short as 200 words to as long as 5000 words. It all depends on what the author wants to convey and how much space they feel is needed to do it effectively.
The number of words in a novel epilogue can be quite different. It often depends on the author's style and the purpose of the epilogue. Sometimes, it's a brief wrap-up of loose ends and could be around 500 words. But if it explores future developments or adds depth to the story, it might go up to 3000 words or more.