15 groups of order 1668.
| SmallGroups | group |
|---|---|
| (1668, 1) | (C139⋊C3)⋊C4 #13131850 |
| (1668, 2) | C4×C139⋊C3 #13131851 |
| (1668, 3) | Dic3×C139 #13131852 |
| (1668, 4) | C3×Dic139 #13131853 |
| (1668, 5) | Dic417 #13131854 |
| (1668, 6) | C3×C4×C139 #13131855 |
| (1668, 7) | C2×D139⋊C3 #13131856 |
| (1668, 8) | D3×D139 #13131857 |
| (1668, 9) | C22×C139⋊C3 #13131858 |
| (1668, 10) | A4×C139 #13131859 |
| (1668, 11) | C22⋊(C139⋊C3) #13131860 |
| (1668, 12) | C2×C3×D139 #13131861 |
| (1668, 13) | C2×D3×C139 #13131862 |
| (1668, 14) | C2×D417 #13131863 |
| (1668, 15) | C22×C3×C139 #13131864 |