No, this is not a typo, it seems.
https://www.rockpapershotgun.com/20...price-specs-release-date-rumours/#more-637543
First spotted by VideoCardz, a leaked photograph from an official Nvidia presentation that was most likely being given to third party AIB (add-in-board) manufacturing partners (your MSIs, Gigabytes Asuses and the like and therefore not the press or general public) appears to confirm that Nvidia's next and newest Turing GPU will indeed be the GTX 1660.
By switching back to their trusty GTX moniker, this would imply the GTX 1660 will not come with any of the Turing RTX family's titular ray tracing cores, which is the fancy pants reflection-enhancing gubbins Nvidia made such a song and dance about during their initial Turing launch at Gamescom last year where they first unveiled the RTX 2080 and RTX 2080 Ti.
Instead, this new GTX 1660 will apparently be based on Nvidia's so-called TU116 GPU. The RTX 2060, by comparison, uses Nvidia's TU106 GPU, so it's currently unclear whether the GTX 1660 will just have those ray tracing cores disabled or whether it's an entirely new die. Prices may well be cheaper if it's the latter, as there's less stuff to bung in the GPU. At the moment, though, the only other specs that appear to be doing the rumour mill rounds are that it will have 1280 CUDA cores and 3GB and 6GB GDDR5 memory variants.
https://www.rockpapershotgun.com/20...price-specs-release-date-rumours/#more-637543