166516016161 has 8 divisors (see below), whose sum is σ = 181670065344. Its totient is φ = 151364671920.

The previous prime is 166516016143. The next prime is 166516016201. The reversal of 166516016161 is 161610615661.

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

It is not a de Polignac number, because 166516016161 - 2⁵ = 166516016129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166516010161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546430 + ... + 794743.

It is an arithmetic number, because the mean of its divisors is an integer number (22708758168).

Almost surely, 2^166516016161 is an apocalyptic number.

166516016161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166516016161 is a deficient number, since it is larger than the sum of its proper divisors (15154049183).

166516016161 is a wasteful number, since it uses less digits than its factorization.

166516016161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352471.

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

The spelling of 166516016161 in words is "one hundred sixty-six billion, five hundred sixteen million, sixteen thousand, one hundred sixty-one".