660161161171 has 2 divisors, whose sum is σ = 660161161172. Its totient is φ = 660161161170.

The previous prime is 660161161151. The next prime is 660161161201. The reversal of 660161161171 is 171161161066.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660161161171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660161161171.

It is not a weakly prime, because it can be changed into another prime (660161161151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330080580585 + 330080580586.

It is an arithmetic number, because the mean of its divisors is an integer number (330080580586).

Almost surely, 2^660161161171 is an apocalyptic number.

660161161171 is a deficient number, since it is larger than the sum of its proper divisors (1).

660161161171 is an equidigital number, since it uses as much as digits as its factorization.

660161161171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 660161161171 in words is "six hundred sixty billion, one hundred sixty-one million, one hundred sixty-one thousand, one hundred seventy-one".