166845026407 has 2 divisors, whose sum is σ = 166845026408. Its totient is φ = 166845026406.

The previous prime is 166845026393. The next prime is 166845026419. The reversal of 166845026407 is 704620548661.

166845026407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (704620548661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166845026407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166845026497) 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, 83422513203 + 83422513204.

It is an arithmetic number, because the mean of its divisors is an integer number (83422513204).

Almost surely, 2^166845026407 is an apocalyptic number.

166845026407 is a deficient number, since it is larger than the sum of its proper divisors (1).

166845026407 is an equidigital number, since it uses as much as digits as its factorization.

166845026407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 166845026407 in words is "one hundred sixty-six billion, eight hundred forty-five million, twenty-six thousand, four hundred seven".