666006005161 has 36 divisors (see below), whose sum is σ = 824335892400. Its totient is φ = 536407111296.

The previous prime is 666006005143. The next prime is 666006005191. The reversal of 666006005161 is 161500600666.

It is a de Polignac number, because none of the positive numbers 2^k-666006005161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666006005161.

It is not an unprimeable number, because it can be changed into a prime (666006005131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8727670 + ... + 8803648.

Almost surely, 2^666006005161 is an apocalyptic number.

It is an amenable number.

666006005161 is a deficient number, since it is larger than the sum of its proper divisors (158329887239).

666006005161 is a wasteful number, since it uses less digits than its factorization.

666006005161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76646 (or 76622 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 666006005161 in words is "six hundred sixty-six billion, six million, five thousand, one hundred sixty-one".