Notes on Isaiah 6:2 (Six Wings of the Seraphim)

Hebrew: See https://www.blueletterbible.org/wlc/isa/6/1/s_685001

ESV: "Above him stood the seraphim. Each had six wings: with two he covered his face, and with two he covered his feet, and with two he flew."

NWT 2013: "Seraphs were standing above him; each had six wings. Each covered his face with two and covered his feet with two, and each of them would fly about with two."

Targums:

JPS 6:2 - "Above Him stood the seraphim; each one had six wings: with twain he covered his face and with twain he covered his feet, and with twain he did fly."

TJBU 6:2 - "Holy ministers on high stood before him: each one had six wings; with twain he covered his face, that it should not see; and with twain he covered his body, that it should not be seen; and with twain he was ministering."

See https://juchre.org/targums/isaiah/comp/isa06.htm

LXX: καὶ σεραφιν εἱστήκεισαν κύκλῳ αὐτοῦ ἓξ πτέρυγες τῷ ἑνὶ καὶ ἓξ πτέρυγες τῷ ἑνί καὶ ταῖς μὲν δυσὶν κατεκάλυπτον τὸ πρόσωπον καὶ ταῖς δυσὶν κατεκάλυπτον τοὺς πόδας καὶ ταῖς δυσὶν ἐπέταντο

The Great Isaiah Scroll (DSS): "Seraphs stood above him, each with six wings. With two they covered their face, with two they covered their feet, and with two they flew."

See http://dss.collections.imj.org.il/isaiah#6:2

Commentary by John Ostwalt (The Book of Isaiah, Chapters 1-39):

One pair of wings is used to cover their faces, for even the most perfect of creatures dare not gaze brazenly into the face of the Creator. The sight would be too much. Another pair covers their feet. The precise meaning of this action is not clear. The Targum has “body” for “feet” and says the body was covered so that it might not be seen. “Feet” is sometimes used in ancient Near Eastern literature as a euphemism for genitalia, and it is possible that such a meaning is intended here (cf. also Ruth 3:4, 7, 8). In any case, the sense is the same, with the part standing for the whole body. As the creature should not look upon the Creator, so the created should not be displayed in the sight of the Creator. But to be in the presence of the Creator is not primarily to be prostrated with awe. Rather, it is to be filled with praise. So, with the third pair of wings the seraphim were flying, all the while calling out their ecstatic song.

I want to build on these notes, but one question I've had lately is why do the seraphs (seraphim) in Isaiah's vision have six wings. Is there any significance beyond the stated reasons given in the verse. Just a question that I have since the number six sometimes depicts uncleanness in Scripture or human imperfection.