This trivia was presented to me last-night and so, thght I'd share this interesting fun fact. You may have to re-read it over a couple times to understand as you may read it the wrong way. Basically, if you turn the numbers upside down you will get the same number :0
Orig source where this 'fact' came, was from a 'Snapple' bottle:
You can find these fun facts under the hood(top) of this drink so, a two f0r one deal! - you get to enjoy a cold drink while 
I personally stopped drinking this stuff years ago when first hearing the rumor of the infamous 'kkk' organization being the maker of the product(s). Honestly I'm not really sure if this is true but I stopped drinking anything but water, really! I sometimes find myself taking a sip of juice every now & again to get some sugar in my blood@times I truly feel my body needs it. I may even find myself drinking juice and or soda when attending parties and 0r someone's house who doesn't have water ;)
Anyway, back to the 'FACT' -
The only "invertable" digits are 0, 1, 6, and 9. It's said to be that the next common-era year that begins with an invertable digit would be in the 7th millennium. 6000sm and the smallest possible invertable digit after 6 is 0.
DID YOU FIND THIS TO BE INTERESTING, FEEL FREE TO COMMENT BELOW