168566366140519 has 2 divisors, whose sum is σ = 168566366140520. Its totient is φ = 168566366140518.

The previous prime is 168566366140457. The next prime is 168566366140531. The reversal of 168566366140519 is 915041663665861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168566366140519 is a prime.

It is a super-2 number, since 2×168566366140519² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168566366540519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84283183070259 + 84283183070260.

It is an arithmetic number, because the mean of its divisors is an integer number (84283183070260).

Almost surely, 2^{168566366140519} is an apocalyptic number.

168566366140519 is a deficient number, since it is larger than the sum of its proper divisors (1).

168566366140519 is an equidigital number, since it uses as much as digits as its factorization.

168566366140519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 167961600, while the sum is 67.

The spelling of 168566366140519 in words is "one hundred sixty-eight trillion, five hundred sixty-six billion, three hundred sixty-six million, one hundred forty thousand, five hundred nineteen".