160561066661 has 2 divisors, whose sum is σ = 160561066662. Its totient is φ = 160561066660.

The previous prime is 160561066639. The next prime is 160561066709. The reversal of 160561066661 is 166660165061.

160561066661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112848964900 + 47712101761 = 335930^2 + 218431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160561066661 is a prime.

It is a super-2 number, since 2×160561066661² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160561066261) 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 as a sum of consecutive naturals, namely, 80280533330 + 80280533331.

It is an arithmetic number, because the mean of its divisors is an integer number (80280533331).

Almost surely, 2^160561066661 is an apocalyptic number.

It is an amenable number.

160561066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

160561066661 is an equidigital number, since it uses as much as digits as its factorization.

160561066661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 160561066661 in words is "one hundred sixty billion, five hundred sixty-one million, sixty-six thousand, six hundred sixty-one".