CD4066B: Input and Output capacitor

Part Number:CD4066B

Hi

I have a question about this device. Is that possible to add any capacitor to IN or OUT line?

If it is possible, how much is that we can add? 

I saw some specification such as input capacitor and output capacitor on the datasheet.

Is this the capacitor of pin(terminal capacity) ? Or is this a capacitor that we can add to input or output?

On the other hands, there are only more than VDD=5V specification. Is that possible to use at VDD=3.3V?

Regards,

Koji Hamamoto