166556105119 has 2 divisors, whose sum is σ = 166556105120. Its totient is φ = 166556105118.

The previous prime is 166556105117. The next prime is 166556105123. The reversal of 166556105119 is 911501655661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166556105119 - 2¹ = 166556105117 is a prime.

It is a super-2 number, since 2×166556105119² (a number of 23 digits) contains 22 as substring.

Together with 166556105117, 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 (166556105117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83278052559 + 83278052560.

It is an arithmetic number, because the mean of its divisors is an integer number (83278052560).

Almost surely, 2^166556105119 is an apocalyptic number.

166556105119 is a deficient number, since it is larger than the sum of its proper divisors (1).

166556105119 is an equidigital number, since it uses as much as digits as its factorization.

166556105119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 166556105119 in words is "one hundred sixty-six billion, five hundred fifty-six million, one hundred five thousand, one hundred nineteen".