Standard_NV6_Promo is an Azure VM size with 6 vCPUs. In East US it costs $0.684 per hour on demand ($499.32 per month) for Linux. It is sold in 14 regions; the cheapest is West US 2 at $0.656 per hour.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.