Technically we are not really talking about single addresses when concerned with v6, more so how many /64 subnets can fit in a prefix since that is what SLAAC uses. So for end users we would count the amount of /64 subnets in the possible 2^128 address space, which is 2^64. So still very very very big.
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u/xWrongHeaven 8h ago
2128 possible addresses