Ooops I overlooked the point the the Sun's Ve of 617.5 km/s is from the sun itself, not the solar system. Does the solar system itself have Ve and even the galaxy itself?
I have read articles about the Voyager probes leaving the solar system (or not) depending on what definition is used. So, another definition - do the Voyagers have sufficient velocity to escape the Sun's gravitati0nal influence?