12 groups of order 21666.
| SmallGroups | group |
|---|---|
| (21666, 1) | C2×C3×C23×C157 #36343537 |
| (21666, 2) | C2×C23×C157⋊C3 #36343538 |
| (21666, 3) | C3×C23×D157 #36343539 |
| (21666, 4) | C3×D23×C157 #36343540 |
| (21666, 5) | C3×D3611 #36343541 |
| (21666, 6) | D3×C23×C157 #36343542 |
| (21666, 7) | C23×D471 #36343543 |
| (21666, 8) | D69×C157 #36343544 |
| (21666, 9) | D10833 #36343545 |
| (21666, 10) | C23×D157⋊C3 #36343546 |
| (21666, 11) | D23×C157⋊C3 #36343547 |
| (21666, 12) | C23⋊(D157⋊C3) #36343548 |