54:64:81

Chord information
Harmonics	54:64:81
Subharmonics	1/(96:81:64)
Intervals from root	1/1–32/27–3/2
Cents from root	0¢–294¢–702¢
Step intervals	32/27, 81/64
Step cents	294¢, 408¢
Prime limit	3
Genus	34 (81)
Intervallic odd limit	81
Otonal odd limit	81
Utonal odd limit	81
Consistent edos (d ≥ 2)	12edo*, 17edo, 24edo, 29edo, …
	* 2 ≤ d < 4; 4 ≤ d < 8; * 8 ≤ d < 16; …

54:64:81, the Pythagorean minor triad, is a 3-limit minor chord found on the ii, iii, and vi of the Pythagorean diatonic scale

It may be considered a 3-limit approximation of 10:12:15 and 27:32:40, or a chord in its own right with a less-stable third. Unlike 10:12:15, 54:64:81 is ambitonal.