Well, it's hard to say exactly. A typical novel could have 5 to 10 significant characters. But it really depends on the story's scope and the author's intention. Some authors prefer a tight focus on a small group, while others create elaborate worlds with many characters to flesh out the narrative.
The number of characters in a typical novel can be anywhere from a few key figures to dozens. It depends on the genre, plot complexity, and the author's style. A romance novel might focus on a couple and a few close friends, but an epic fantasy could have a vast array of characters.