160000565661 has 12 divisors (see below), whose sum is σ = 236748805020. Its totient is φ = 104065408320.

The previous prime is 160000565633. The next prime is 160000565663. The reversal of 160000565661 is 166565000061.

It can be written as a sum of positive squares in 2 ways, for example, as 2685208761 + 157315356900 = 51819^2 + 396630^2 .

It is not a de Polignac number, because 160000565661 - 2¹⁷ = 160000434589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160000565663) 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 11 ways as a sum of consecutive naturals, for example, 216802566 + ... + 216803303.

It is an arithmetic number, because the mean of its divisors is an integer number (19729067085).

Almost surely, 2^160000565661 is an apocalyptic number.

It is an amenable number.

160000565661 is a deficient number, since it is larger than the sum of its proper divisors (76748239359).

160000565661 is a wasteful number, since it uses less digits than its factorization.

160000565661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433605916 (or 433605913 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 160000565661 in words is "one hundred sixty billion, five hundred sixty-five thousand, six hundred sixty-one".