what satalite is traveling deep space right now?

Viking Satellites

2 Pioneer and 2 Voyager probes.

Assuming you mean man made spacecraft: Voyager 1 and 2, and Pioneer 10 and 11.

2 pioneer.
2 Voyager

currently there are 7 man made spacecraft outside the orbit of mars with 4 outside the orbit of pluto. pioneer 10 and 11, voyager 1 and 2. cassini is orbiting saturn, ulysses is orbiting the sun at the approximate distance of jupiter. and the new horizons probe is betwween the orbits of jupiter and saturn on its way to pluto. the furthest currently is voyager1 although it will eventually be overtaken by new horizons.