16166026666161 has 24 divisors (see below), whose sum is σ = 24024918513960. Its totient is φ = 10468574035200.

The previous prime is 16166026666157. The next prime is 16166026666169. The reversal of 16166026666161 is 16166662066161.

It can be written as a sum of positive squares in 4 ways, for example, as 8593290000 + 16157433376161 = 92700^2 + 4019631^2 .

It is not a de Polignac number, because 16166026666161 - 2² = 16166026666157 is a prime.

It is a super-2 number, since 2×16166026666161² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16166026666098 and 16166026666107.

It is not an unprimeable number, because it can be changed into a prime (16166026666169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95571330 + ... + 95740331.

It is an arithmetic number, because the mean of its divisors is an integer number (1001038271415).

Almost surely, 2^{16166026666161} is an apocalyptic number.

It is an amenable number.

16166026666161 is a deficient number, since it is larger than the sum of its proper divisors (7858891847799).

16166026666161 is a wasteful number, since it uses less digits than its factorization.

16166026666161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191311937 (or 191311934 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 16166026666161 in words is "sixteen trillion, one hundred sixty-six billion, twenty-six million, six hundred sixty-six thousand, one hundred sixty-one".