65536
65,536 (sixteen five thousand five hundred thirty six) is the natural number following 65,535 and preceding 65,537. It is equal to and is the number of codepoints in Unicode plane. It also just happens to look decently cool in base 10.

Anatomy
65
The first two digits of this number spell "65" sets the stage for the second half. 65 doesn't have any particularly notable properties I care about in the context of this number, so I'll just leave it at that.
5_6
The second half has the same digits as the first half in reverse order, but with something placed in the middle.
3
And this 3 pops in the middle of the second half for a little bit of asymmetry.