166834747127 has 2 divisors, whose sum is σ = 166834747128. Its totient is φ = 166834747126.

The previous prime is 166834747109. The next prime is 166834747217. The reversal of 166834747127 is 721747438661.

166834747127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (166834747217) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (721747438661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166834747127 - 2⁶ = 166834747063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166834741127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83417373563 + 83417373564.

It is an arithmetic number, because the mean of its divisors is an integer number (83417373564).

Almost surely, 2^166834747127 is an apocalyptic number.

166834747127 is a deficient number, since it is larger than the sum of its proper divisors (1).

166834747127 is an equidigital number, since it uses as much as digits as its factorization.

166834747127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 56.

The spelling of 166834747127 in words is "one hundred sixty-six billion, eight hundred thirty-four million, seven hundred forty-seven thousand, one hundred twenty-seven".