166530541161 has 16 divisors (see below), whose sum is σ = 222344408000. Its totient is φ = 110868609600.

The previous prime is 166530541159. The next prime is 166530541183. The reversal of 166530541161 is 161145035661.

It is not a de Polignac number, because 166530541161 - 2¹ = 166530541159 is a prime.

It is a super-2 number, since 2×166530541161² (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 (166530540161) 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, 8657991 + ... + 8677203.

It is an arithmetic number, because the mean of its divisors is an integer number (13896525500).

Almost surely, 2^166530541161 is an apocalyptic number.

It is an amenable number.

166530541161 is a deficient number, since it is larger than the sum of its proper divisors (55813866839).

166530541161 is a wasteful number, since it uses less digits than its factorization.

166530541161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23016.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 166530541161 in words is "one hundred sixty-six billion, five hundred thirty million, five hundred forty-one thousand, one hundred sixty-one".