66666666 is very auspicious number in china. it's not "lucky" but has significant meaning. nothing evil at all. the fact this domain has all six to chinese investor this domain is rare. each number counts as +1 as opposed to +8. from 1-10 you need to remove 0 and 4 so left with 8 valued numbers. I forgot the meaning 6 but it is a "good" number. This domain is 1x1x1x1x1x1x1x1= 1 because it is all the same number if it had been say one or two numbers off? then the calculation becomes 1x1x1x8x1x8x1x1=64 possiblilities if it were a set of 8 random numbers but with no 0 and 4? it would look like this. 8x8x8x8x8x8x8x8= 16,777,216 possible permutations. I guess this is what the buyer is paying for. that plus there are only 10 possible 8 character .coms in the world with all the same number. And the fact that it is 8 numbers also is auspicious.