67371265

Appears in sequences

• Carmichael numbers equal to the product of 5 primes.at n=18A112428
• Carmichael numbers (A002997) k such that k-1 is a square.at n=2A265285
• Carmichael numbers (A002997) k such that k-1 is a perfect power (A001597).at n=5A265328
• Carmichael numbers k such that Euler totient function of k (phi(k)) is a perfect square.at n=22A272798
• Numbers of the form n^2+1 that divide 4^n-1.at n=7A273999
• Smallest number k such that gcd(phi(k), k-1) = n * lambda(k).at n=26A284089
• Carmichael numbers k for which A053575(k) [the odd part of phi] divides k-1.at n=24A339869
• Fermat pseudoprimes to base 2 that are palindromic in base 2.at n=28A346567
• Carmichael numbers ending in 5.at n=30A355305
• Smallest n-bit Carmichael number, or 0 if no such number exists.at n=17A375875