17668334261 has 2 divisors, whose sum is σ = 17668334262. Its totient is φ = 17668334260.

The previous prime is 17668334249. The next prime is 17668334263. The reversal of 17668334261 is 16243386671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16659064900 + 1009269361 = 129070^2 + 31769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17668334261 is a prime.

It is a super-2 number, since 2×17668334261² (a number of 21 digits) contains 22 as substring.

Together with 17668334263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17668334263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8834167130 + 8834167131.

It is an arithmetic number, because the mean of its divisors is an integer number (8834167131).

Almost surely, 2^17668334261 is an apocalyptic number.

It is an amenable number.

17668334261 is a deficient number, since it is larger than the sum of its proper divisors (1).

17668334261 is an equidigital number, since it uses as much as digits as its factorization.

17668334261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 47.

The spelling of 17668334261 in words is "seventeen billion, six hundred sixty-eight million, three hundred thirty-four thousand, two hundred sixty-one".