Can a 75 ohm digital rca cable be used in place of a regular rca interconnect?

@rotarius 

No not at all. 75 ohm is the characteristic impedance of a coax cable. Google it for a proper technical explanation.  

Nope. Not even remotely correct. Coaxial cables come in more than one characteristic impedance, and that is “Z” for impedance, not resistance, which is a static value, regardless of the operating frequency range. There are many more different coaxial cable impedance specs as there are hat sizes.  Two of the more common values are 50 ohm and 75 ohm. Impedance is what describes the dynamic, frequency-affected component due to capacitive and inductive reactance. 

...so it's ok to use a 75ohm digital RCA cable instead of a regular rca cable from receiver to amplifier without messing up the audio signal or components?

75 ohm digital cable is no worse than garden variety coaxial audio cable for conveying analog audio signals. The downfall of coaxial cable is that only the center conductor benefits from the shielding. You may want to step up to single pair analog audio or single pair digital audio shielded cable. In this application, the signal runs on one wire of the pair, the signal ground runs on the other wire of the pair, and both are shielded by a foil and braid with a drain wire connected to (ideally) chassis earth ground or (less desirably) signal ground, in each case only at one end (usually the pre-amp) of the cable.

OP
it is going to work just fine but only your ears in your system are going to tell you if it is better or not.
You are not going to damage anything so try it as you have it.