It could be, but it is most commonly known as just a six string bass. it is a guitar with slightly thicker strings and tuned to sound like an electric bass guitar.
If you mean the "scale length", (the dimension between the nut and the bridge) it is 34 inches. The overall length (from body to end of end) will depend on the particular model of Fender bass.
Over...
No. Because of the thickness of the strings, an ordinary 6-String electric guitar could not produce a sound that low compared to a regular bass guitar. For example the size of the strings for a...