Good heavens, yes. The late Barbara Cartland used to dictate one a week - well, maybe it was one a month, but anyway, you get the idea.
Of course, it's possible that it's not a particularly good novel, but that's another issue. And you've probably heard of NaNoWriMo, where people write a novel in three days while doing nothing else. Of course, they already have the story written in their thoughts, but the physical writing/typing is confined to three days. cheap reliable essay writing service.