166161793188161 has 8 divisors (see below), whose sum is σ = 174910433412000. Its totient is φ = 157413481233120.

The previous prime is 166161793188143. The next prime is 166161793188163. The reversal of 166161793188161 is 161881397161661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166161793188161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166161793188163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81027860 + ... + 83053221.

It is an arithmetic number, because the mean of its divisors is an integer number (21863804176500).

Almost surely, 2^{166161793188161} is an apocalyptic number.

It is an amenable number.

166161793188161 is a deficient number, since it is larger than the sum of its proper divisors (8748640223839).

166161793188161 is a wasteful number, since it uses less digits than its factorization.

166161793188161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164134399.

The product of its digits is 15676416, while the sum is 65.

The spelling of 166161793188161 in words is "one hundred sixty-six trillion, one hundred sixty-one billion, seven hundred ninety-three million, one hundred eighty-eight thousand, one hundred sixty-one".