it looks like the ATmega boards are capable of a 64 bit float variable. is there any way to be able to run a function that requires a "Double" variable without significantly reducing its accuracy?

"Double" variables in arduino

Topic		Replies	Views
Data Types: does double and float exactly the same in Arduino? Programming	9	2175	May 5, 2021
Float vs. double in math.h and arduino libraries Syntax & Programs	3	8392	May 6, 2021
Clarify float and double data types identical Bugs & Suggestions	13	7876	May 6, 2021
Speed of floating point operations -- test results Syntax & Programs	14	34879	May 6, 2021
documented length of Double appears to be incorrec Bugs & Suggestions	12	4593	May 6, 2021