166053955213 has 2 divisors, whose sum is σ = 166053955214. Its totient is φ = 166053955212.

The previous prime is 166053955159. The next prime is 166053955247. The reversal of 166053955213 is 312559350661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154337408164 + 11716547049 = 392858^2 + 108243^2 .

It is a cyclic number.

It is not a de Polignac number, because 166053955213 - 2²⁵ = 166020400781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166053955273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83026977606 + 83026977607.

It is an arithmetic number, because the mean of its divisors is an integer number (83026977607).

Almost surely, 2^166053955213 is an apocalyptic number.

It is an amenable number.

166053955213 is a deficient number, since it is larger than the sum of its proper divisors (1).

166053955213 is an equidigital number, since it uses as much as digits as its factorization.

166053955213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729000, while the sum is 46.

The spelling of 166053955213 in words is "one hundred sixty-six billion, fifty-three million, nine hundred fifty-five thousand, two hundred thirteen".