I am a number, I've a number of names.
My name is in itself.
I am hiding in plain sight.
I am damned if I don't and damned if I do.
(Perhaps this riddle would be better if it rhymed...)
"I am a number" is not meant to be taken literally. The answer is not a number.
I am a master of many, choosing to become a slave.
My spirit belongs to another, my face to another still.