I think it really depends on your timeline. Honestly, your current score is quite solid, especially with that impressive verbal. There's no meaningful difference in quant ability between a 166 and a 170—those 4 points are often just a couple of minor mistakes. And retaking could risk your verbal score dropping, as GRE doesn’t allow you to combine section scores from multiple attempts like TOEFL does.If you’re aiming to boost your score, it could take several tries (and more time and money). But if you have plenty of time on your hands, it could be worth a shot. Just consider if it's really necessary given your already strong score!