26 The Hebrew term כִּכָּר (kikkar, “circle”) refers generally to something that is round. When used of metals it can refer to a disk-shaped weight made of the metal or to a standard unit of weight, generally regarded as a talent. Since the accepted weight for a talent of metal is about 75 pounds, this would have amounted to about 50,000 pounds of gold (cf. ); , “twenty-five tons”; “almost 23,000 kilogrammes.”
27 Heb “the weight of the gold which came to Solomon in one year was 666 talents of gold.”

In other versions

Now the weight of gold that came to Solomon in one year was 666 talents of gold,

The weight of the gold that Solomon received yearly was 666 talents,

The weight of gold that came to Solomon annually was twenty-five tons,

Each year Solomon received about 25 tons of gold.

The weight of the gold that came to Solomon in one year was six hundred and sixty-six talents of gold,

Now the weight of gold that came to Solomon in one year was six hundred threescore and six talents of gold,

Public Domain