Jax Pavan was one of the 582,797,754 Human males named Jax Pavan on Coruscant. He was the 667th man to register the name and he had waited long and hard for Jax Pavan 665 to register before heading to the Bureau of Jax Pavan Registry to sign up and become the 666th. However, he underestimated the speed with which his competitors would get to the office and was too late. When he registered, his number came back 667. The number had already been registered to Jax Pavan 666, another Satanist who had camped just outside the door of the building for months waiting for the number. Needless to say, 667 was pretty pissed and he went all the way to Tatooine, where Galactic Emperor Pulpitine was about to draw a number out of a bantha's head to decide which Jax Pavan to kill off. 667 snuck in a few minutes before the ceremony and changed the numbers from "66" to "666" and waited in the crowd. He watched as Pulpitine drew the piece of paper from the skull and raised it high, declaring to the galaxy that Jax Pavan 666 would be killed in the streets.
667 laughed so hard that he fell backward and right into a very pointy stick. he was swung over the edge of a cliff when the rock the stick was coming from was pushed back. Though he tried to use his jetpack, it couldn't lift the rock and as a result he fell into the maw of a sarlacc. He died when the juices consumed him. It is known that he died between forty and sixty years later. I mean, what else could have happened? He's not Boba Fett.
Though he would not see his plan come to fruition, 666 was eventually tracked down by Pulpitine zealots on Coruscant and succinctly pwned beyond recognition.