166171

Appears in sequences

• Numbers k that are the products of two distinct primes such that 2*k-1, 4*k-3, 8*k-7, 16*k-15, 32*k-31, 64*k-63 and 128*k-127 are also products of two distinct primes.at n=19A177216
• Composite numbers which contain their sum of aliquot parts as a substring.at n=34A225417