166536161 has 16 divisors (see below), whose sum is σ = 185517888. Its totient is φ = 148219200.

The previous prime is 166536157. The next prime is 166536163. The reversal of 166536161 is 161635661.

It is a cyclic number.

It is not a de Polignac number, because 166536161 - 2² = 166536157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166536163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189455 + ... + 190331.

It is an arithmetic number, because the mean of its divisors is an integer number (11594868).

Almost surely, 2^166536161 is an apocalyptic number.

166536161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166536161 is a deficient number, since it is larger than the sum of its proper divisors (18981727).

166536161 is a wasteful number, since it uses less digits than its factorization.

166536161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its digits is 19440, while the sum is 35.

The square root of 166536161 is about 12904.8890347806. The cubic root of 166536161 is about 550.1775305688.

The spelling of 166536161 in words is "one hundred sixty-six million, five hundred thirty-six thousand, one hundred sixty-one".