They are four consonents in Απόλλων, ΠΛΛΝ, thus wouldn't this be a tetragrammaton. cf. ١ّللَه.
in his Hymn to Delos, says that swans flew seven times around the island of Delos
During Hajj, pilgrims must walk around the Kabaa seven times counterclockwise and Mecca clearly modelled after the Temple of Apollo in Delphi and the Kabba itself represents an ὀμφαλός (Navel), sacred to Apollo.
ὀμφαλός
centre or middle point : “νήσῳ ἐν ἀμφιρύτῃ, ὅθι τ᾽ ὀ. ἐστι θαλάσσης” Od.1.50 (only here in Od.) ; later Delphi (or rather a round stone in the Delphic temple) was called ὀ. as marking the middle point of Earth,
centre or middle point : “νήσῳ ἐν ἀμφιρύτῃ, ὅθι τ᾽ ὀ. ἐστι θαλάσσης” Od.1.50 (only here in Od.) ; later Delphi (or rather a round stone in the Delphic temple) was called ὀ. as marking the middle point of Earth,
The heights that overlook Mecca, Mount Arafat. The word عَرَفَات came from the Greek, ὄροφος,
ὀρόφους Φοίβου, i.e. Phoebus roof, Temple of Apollo.