166001506167577 has 2 divisors, whose sum is σ = 166001506167578. Its totient is φ = 166001506167576.

The previous prime is 166001506167547. The next prime is 166001506167683. The reversal of 166001506167577 is 775761605100661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158329775063056 + 7671731104521 = 12582916^2 + 2769789^2 .

It is a cyclic number.

It is not a de Polignac number, because 166001506167577 - 2¹¹ = 166001506165529 is a prime.

It is not a weakly prime, because it can be changed into another prime (166001506167547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83000753083788 + 83000753083789.

It is an arithmetic number, because the mean of its divisors is an integer number (83000753083789).

Almost surely, 2^{166001506167577} is an apocalyptic number.

It is an amenable number.

166001506167577 is a deficient number, since it is larger than the sum of its proper divisors (1).

166001506167577 is an equidigital number, since it uses as much as digits as its factorization.

166001506167577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11113200, while the sum is 58.

The spelling of 166001506167577 in words is "one hundred sixty-six trillion, one billion, five hundred six million, one hundred sixty-seven thousand, five hundred seventy-seven".