66005155161 has 12 divisors (see below), whose sum is σ = 104008123440. Its totient is φ = 40003124280.

The previous prime is 66005155159. The next prime is 66005155169. The reversal of 66005155161 is 16155150066.

It is not a de Polignac number, because 66005155161 - 2¹ = 66005155159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66005155169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333359271 + ... + 333359468.

It is an arithmetic number, because the mean of its divisors is an integer number (8667343620).

Almost surely, 2^66005155161 is an apocalyptic number.

It is an amenable number.

66005155161 is a deficient number, since it is larger than the sum of its proper divisors (38002968279).

66005155161 is a wasteful number, since it uses less digits than its factorization.

66005155161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666718756 (or 666718753 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 66005155161 in words is "sixty-six billion, five million, one hundred fifty-five thousand, one hundred sixty-one".