Seven (7)
Perfect number and symbol of the divine abundance, it is also according to the Bible the number of the punishment, the purification and the penitence. It is also attributed to Satan who tries to copy God being the monkey of God. Also the infernal beast of the Revelation (Rv 13,1) has seven heads.
The seven demons that came out of Mary Magdalene. (Lk 8,2)
Songs referenced:
Happy Phantom