Can one daven Chazaras Hashatz if there were not even six people who davened SE together? Does it make a difference if it is anyway after the zman tefilla?
If the fifth person didn’t daven together with the other five they can not say Chazoras Hashatz.
Ishei Yisroel 34-9 ftnt. 25 pg. 364, Maharsham 4-148 that if they didn’t daven together they can’t say Chazoras Hashatz, Shearim Hamitzuyanim B’halacha 15 ftnt. 3. If the fifth person started davening later then the rest, see Minchas Yitzchok 1-58.