The maximum clock frequency for the CD74HC165M is 25 MHz.
Yes, the CD74HC165M is compatible with 5V power supplies, but it can also operate with a supply voltage as low as 2V.
The CD74HC165M has a asynchronous reset input (SRCLR) that can be used to reset the shift register. When the SRCLR input is low, the shift register is reset.
The propagation delay of the CD74HC165M is typically around 10-15 ns, but this can vary depending on the operating conditions and load capacitance.
Yes, the CD74HC165M can be used as a serial-to-parallel converter by clocking in serial data and then latching the output to obtain parallel data.