There are approximately 86 billion neurons in the human brain, give or take a few million.
Our next closest competitors in the animal kingdom are gorillas, who have around 33 billion, and then elephants with a far more generous 257 billion.
To put all those numbers into perspective, our Milky Way galaxy has somewhere between 200–400 billion stars. That’s a lot of zeroes (and gas).
Although other animals do have artistic tendencies, sadly, neither gorillas nor elephants have been able to write a bestselling novel.