Consider the humble integer.
my $number-of-dwarfs = 7;
say $number-of-dwarfs.WHAT; # (Int)
Integers are great. (Well, many of them are.) Computers basically run on integers. Also, God made the integers, and everything else is basically cheap Chinese knock-offs of the real thing. If they're so important, we'd expect to have lots of good ways of writing them in any respectable programming language.
Do we have lots of ways of writing integers in Perl 6? We do. (Does that make Perl 6 respectable? No, because it's a necessary but not sufficient condition. Duh.)
One thing we might want to do, for example, is write our numbers in other number bases. The need for this crops up now and then, for example if you're stranded on Binarium where everyone has a total of two fingers: