Well, there's no fixed number. It can range from 30,000 to 100,000 words or more. It depends on factors like the complexity of the story and your initial planning.
The word count of a novel first draft can be all over the place. It could be as few as 20,000 words if it's a concise story, or exceed 150,000 words for an epic. It mainly depends on your vision and the nature of the story you want to tell.