166200552197 has 2 divisors, whose sum is σ = 166200552198. Its totient is φ = 166200552196.

The previous prime is 166200552187. The next prime is 166200552251. The reversal of 166200552197 is 791255002661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115174711876 + 51025840321 = 339374^2 + 225889^2 .

It is a cyclic number.

It is not a de Polignac number, because 166200552197 - 2⁸ = 166200551941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166200552157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83100276098 + 83100276099.

It is an arithmetic number, because the mean of its divisors is an integer number (83100276099).

Almost surely, 2^166200552197 is an apocalyptic number.

It is an amenable number.

166200552197 is a deficient number, since it is larger than the sum of its proper divisors (1).

166200552197 is an equidigital number, since it uses as much as digits as its factorization.

166200552197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 166200552197 in words is "one hundred sixty-six billion, two hundred million, five hundred fifty-two thousand, one hundred ninety-seven".