160731665 has 12 divisors (see below), whose sum is σ = 194039964. Its totient is φ = 127814976.

The previous prime is 160731653. The next prime is 160731679. The reversal of 160731665 is 566137061.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1164241 + 159567424 = 1079^2 + 12632^2 .

It is not a de Polignac number, because 160731665 - 2¹⁰ = 160730641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261899 + ... + 262511.

It is an arithmetic number, because the mean of its divisors is an integer number (16169997).

Almost surely, 2^160731665 is an apocalyptic number.

It is an amenable number.

160731665 is a deficient number, since it is larger than the sum of its proper divisors (33308299).

160731665 is an frugal number, since it uses more digits than its factorization.

160731665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 160731665 is about 12677.9992506704. Note that the first 3 decimals coincide. The cubic root of 160731665 is about 543.7097836113.

The spelling of 160731665 in words is "one hundred sixty million, seven hundred thirty-one thousand, six hundred sixty-five".