Elephants have 3x the neurons of a human. Bees have about a million and they have complex relationships, emotions, and can remember the faces of humans. Neuron counts correspond more to body size than actual cognitive abilities.

And brains are pretty complicated in how they're arranged. A large portion of the brain basically serves as an operating system of sorts, just managing breathing, moving, detecting smells, producing language, decoding language, etc. Cut all of that out and we're left with thinking and emotions.