166580114652161 has 4 divisors (see below), whose sum is σ = 190377273888192. Its totient is φ = 142782955416132.

The previous prime is 166580114652139. The next prime is 166580114652209. The reversal of 166580114652161 is 161256411085661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166580114652161 - 2⁶ = 166580114652097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166580114652131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11898579618005 + ... + 11898579618018.

It is an arithmetic number, because the mean of its divisors is an integer number (47594318472048).

Almost surely, 2^{166580114652161} is an apocalyptic number.

It is an amenable number.

166580114652161 is a deficient number, since it is larger than the sum of its proper divisors (23797159236031).

166580114652161 is an equidigital number, since it uses as much as digits as its factorization.

166580114652161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23797159236030.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The spelling of 166580114652161 in words is "one hundred sixty-six trillion, five hundred eighty billion, one hundred fourteen million, six hundred fifty-two thousand, one hundred sixty-one".