Finite Group DatabasebetaFinite Group DatabasebetaOrder 648.
30 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C4×C81 | C2 | 1 | 3 | yes | maximal |
| 2 | Q8×C27 | C3 | 1 | 1 | yes | maximal, characteristic |
| 3 | C2×C81 | C22 | 1 | 1 | yes | characteristic |
| 4 | C4×C27 | C2×C3 | 1 | 3 | yes | — |
| 5 | C81 | Q8 | 1 | 1 | yes | characteristic, direct product factor, Sylow |
| 6 | Q8×C9 | C9 | 1 | 1 | yes | characteristic |
| 7 | C2×C27 | C22×C3 | 1 | 1 | yes | characteristic |
| 8 | C4×C9 | C2×C9 | 1 | 3 | yes | — |
| 9 | C27 | C3×Q8 | 1 | 1 | yes | characteristic |
| 10 | C3×Q8 | C27 | 1 | 1 | yes | characteristic |
| 11 | C2×C9 | C22×C9 | 1 | 1 | yes | characteristic |
| 12 | C3×C4 | C2×C27 | 1 | 3 | yes | — |
| 13 | C9 | Q8×C9 | 1 | 1 | yes | characteristic |
| 14 | Q8 | C81 | 1 | 1 | yes | characteristic, direct product factor, Sylow |
| 15 | C2×C3 | C22×C27 | 1 | 1 | yes | characteristic |
| 16 | C4 | C2×C81 | 1 | 3 | yes | — |
| 17 | C3 | Q8×C27 | 1 | 1 | yes | characteristic |
| 18 | C2 | C22×C81 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center | C2×C81 | C22 |
| commutator | C2 | C22×C81 |
| Frattini, cosocle | C2×C27 | C22×C3 |
| socle, prime radical | C2×C3 | C22×C27 |
| LCS | G ▷ C2 ▷ C1 | |
| UCS | C1 ◁ C2×C81 ◁ G | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 5. C81 | Q8 | direct (N × H) |
| 14. Q8 | C81 | direct (N × H) |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C4×C81 | 2 |
| Q8×C27 | 3 |