166669061101 has 2 divisors, whose sum is σ = 166669061102. Its totient is φ = 166669061100.

The previous prime is 166669061099. The next prime is 166669061107. The reversal of 166669061101 is 101160966661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163722199876 + 2946861225 = 404626^2 + 54285^2 .

It is an emirp because it is prime and its reverse (101160966661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 101190699991 and 199996091101.

It is a cyclic number.

It is not a de Polignac number, because 166669061101 - 2¹ = 166669061099 is a prime.

Together with 166669061099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166669061107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83334530550 + 83334530551.

It is an arithmetic number, because the mean of its divisors is an integer number (83334530551).

Almost surely, 2^166669061101 is an apocalyptic number.

It is an amenable number.

166669061101 is a deficient number, since it is larger than the sum of its proper divisors (1).

166669061101 is an equidigital number, since it uses as much as digits as its factorization.

166669061101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 166669061101 in words is "one hundred sixty-six billion, six hundred sixty-nine million, sixty-one thousand, one hundred one".