7799

7799 = 11 x 709.

7799 is a semiprime made up of two rums of identical digits (A116063).

7799 is the least semiprime whose sum of prime factors equals 6! (A193216).

The sum of the digits of 7799 is 8 times the number of digits (A061425).

7799 divides 96²⁰ - 1.

Source: OEIS