According to Dr. James O’Donoghued, who is a planetary astronomer and science communicator. “A day on Jupiter is 9hr 56min, and it’s the biggest and also the fastest planet. In the early solar system, it grew from loads of Sun orbiting material, converting the orbital momentum into spin angular momentum.” Bigger planets are likely to be fast for this reason
NASA says that Jupiter, the fifth planet from the sun, is so great in mass that it is twice as massive as all the other planets combined.
Picture this… If Jupiter was a container, you could fit 1,300 Earths inside it before it was filled. Or, if Earth was the size of a nickel, Jupiter would be about as big as a basketball.