17666668471 has 2 divisors, whose sum is σ = 17666668472. Its totient is φ = 17666668470.

The previous prime is 17666668469. The next prime is 17666668489. The reversal of 17666668471 is 17486666671.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17666668471 - 2¹ = 17666668469 is a prime.

It is a super-3 number, since 3×17666668471³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 17666668469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17666668421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8833334235 + 8833334236.

It is an arithmetic number, because the mean of its divisors is an integer number (8833334236).

Almost surely, 2^17666668471 is an apocalyptic number.

17666668471 is a deficient number, since it is larger than the sum of its proper divisors (1).

17666668471 is an equidigital number, since it uses as much as digits as its factorization.

17666668471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 58.

The spelling of 17666668471 in words is "seventeen billion, six hundred sixty-six million, six hundred sixty-eight thousand, four hundred seventy-one".