166950691211 has 2 divisors, whose sum is σ = 166950691212. Its totient is φ = 166950691210.

The previous prime is 166950691111. The next prime is 166950691333. The reversal of 166950691211 is 112196059661.

166950691211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166950691211 - 2³⁴ = 149770822027 is a prime.

It is not a weakly prime, because it can be changed into another prime (166950691111) 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, 83475345605 + 83475345606.

It is an arithmetic number, because the mean of its divisors is an integer number (83475345606).

Almost surely, 2^166950691211 is an apocalyptic number.

166950691211 is a deficient number, since it is larger than the sum of its proper divisors (1).

166950691211 is an equidigital number, since it uses as much as digits as its factorization.

166950691211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 47.

The spelling of 166950691211 in words is "one hundred sixty-six billion, nine hundred fifty million, six hundred ninety-one thousand, two hundred eleven".