USA 666 is very much involved with aspects of my family and my remembrances of my childhood. It really is part of the American scene. It is actually, of course, one of my paintings that I call the American Dream. USA 666 is the Sixth Dream and the Sixth Dream, since my father was born in June, is more or less involved with the memory of him. It was started after he had died and six was a number that was very dominant—popped up largely—in his life.
— Robert Indiana
Donald B. Goodall, “Conversations with Robert Indiana,” in Robert L. B. Tobin, William Katz, and Donald B. Goodall, Robert Indiana (Austin: University of Texas, 1977), p. 30.