115066166161 has 4 divisors (see below), whose sum is σ = 115513894692. Its totient is φ = 114618437632.

The previous prime is 115066166107. The next prime is 115066166227. The reversal of 115066166161 is 161661660511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161661660511 = 13 ⋅12435512347.

It can be written as a sum of positive squares in 2 ways, for example, as 110889000000 + 4177166161 = 333000^2 + 64631^2 .

It is a cyclic number.

It is not a de Polignac number, because 115066166161 - 2²³ = 115057777553 is a prime.

It is a super-2 number, since 2×115066166161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115066166461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223863880 + ... + 223864393.

It is an arithmetic number, because the mean of its divisors is an integer number (28878473673).

Almost surely, 2^115066166161 is an apocalyptic number.

It is an amenable number.

115066166161 is a deficient number, since it is larger than the sum of its proper divisors (447728531).

115066166161 is an equidigital number, since it uses as much as digits as its factorization.

115066166161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447728530.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 115066166161 in words is "one hundred fifteen billion, sixty-six million, one hundred sixty-six thousand, one hundred sixty-one".