2658

2658 = 2 x 3 x 443.

2658 has the representation 2⁵ x 3⁴ + 66.

2658 is the number of 8-digit numbers in base 6 with adjacent digits differing by one or less.

2658¹ + 2658² + 2658³ + 2658⁴ + 1 and 2658¹ + 2658² + 2658³ + 2658⁴ - 1 are twin primes.

2658 is a square-free number and its neighbors, 2657 and 2659, are both primes.

NGC 2658 is an open cluster in the constellation Pyxis.

Source: On-Line Encyclopedia of Integer Sequences