piano chord
D♭m7
D♭1F♭♭3A♭5C♭♭7
Minor triad with a minor seventh. The same four notes as a major sixth chord a third above.
Written the other way round it is C♯m7 — the same twelve keys on a piano, a different piece of notation.
What is true of it
D♭m7 is D♭, F♭, A♭ and C♭ — 1, b3, 5 and b7 counted from D♭.
These are also the notes of E6/D♭. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
On an instrument that cannot reach all 4, the 5 goes first, in that order.