180566665081 has 16 divisors (see below), whose sum is σ = 198843670080. Its totient is φ = 162600799680.

The previous prime is 180566665051. The next prime is 180566665093.

180566665081 is nontrivially palindromic in base 10.

180566665081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 180566665081 - 2⁷ = 180566664953 is a prime.

It is a super-2 number, since 2×180566665081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180566665001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4809675 + ... + 4847071.

It is an arithmetic number, because the mean of its divisors is an integer number (12427729380).

Almost surely, 2^180566665081 is an apocalyptic number.

180566665081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

180566665081 is a deficient number, since it is larger than the sum of its proper divisors (18277004999).

180566665081 is a wasteful number, since it uses less digits than its factorization.

180566665081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41544.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 180566665081 in words is "one hundred eighty billion, five hundred sixty-six million, six hundred sixty-five thousand, eighty-one".