105666105161 has 4 divisors (see below), whose sum is σ = 106712304324. Its totient is φ = 104619906000.

The previous prime is 105666105121. The next prime is 105666105187. The reversal of 105666105161 is 161501666501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104616021136 + 1050084025 = 323444^2 + 32405^2 .

It is a cyclic number.

It is not a de Polignac number, because 105666105161 - 2³⁴ = 88486235977 is a prime.

It is a super-2 number, since 2×105666105161² (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 (105666105121) 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 in 3 ways as a sum of consecutive naturals, for example, 523099430 + ... + 523099631.

It is an arithmetic number, because the mean of its divisors is an integer number (26678076081).

Almost surely, 2^105666105161 is an apocalyptic number.

It is an amenable number.

105666105161 is a deficient number, since it is larger than the sum of its proper divisors (1046199163).

105666105161 is a wasteful number, since it uses less digits than its factorization.

105666105161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046199162.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 105666105161 in words is "one hundred five billion, six hundred sixty-six million, one hundred five thousand, one hundred sixty-one".