666 has been played on NTS shows including A Fist in the Face of God presents: Midnite Madness, with Alkohol first played on 23 June 2020.

666 may refer to multiple artists:

666 was a German DJ act, formed by Thomas Detert and Mike Griesheimer in 1997. They produced a mix of electronic music and often included lyrics in Spanish and English. The act disbanded in 2005.

A heavy/speed metal band from Caseros, Buenos Aires, Argentina, which released a demo in 1986.

A thrash/black metal band from Czechia.

A black metal band from Hungary.

A groove/thrash metal/hard rock band from Japan.

A crossover thrash band…