[aconsult1]

Absolutely agree. Having a number that brings joy to a specific group of people is way better than having an obvious "lots of X digits" kind of number. I had a mobile phone for 10+ years that was composed of a sequence of 2-digit perfect square numbers. Like 6481-1649 for example. I have many many friends that to this day can call my old number just by remembering the square roots which were pretty easy to memorize. Funny thing happened when the whole country added a leading 9 digit to increase the amount of possible users in the network. It was just sweet because it meant an extra 3 as a square root to my number.

I've moved to a different country a few years later so I lost that number but at least I managed to transfer it to a good friend who appreciated the math part of it. He still gets calls, many years later, from friends looking up for me.