Order 648.
79 conjugacy classes of subgroups.
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 2. C3×Q8×C9 | C3 | semidirect |
| 3. C3×Q8⋊C9 | C3 | semidirect |
| 10. C3×SL(2,𝔽3) | C9 | semidirect |
| 20. C3×C9 | SL(2,𝔽3) | semidirect |
| 40. Q8 | C32⋊C9 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C32×SL(2,𝔽3) | 3 |
| C3×Q8×C9 | 3 |
| C3×Q8⋊C9 | 3 |
| C2×C32⋊C9 | 4 |