165818056 has 32 divisors (see below), whose sum is σ = 322947000. Its totient is φ = 79722496.

The previous prime is 165818033. The next prime is 165818129. The reversal of 165818056 is 650818561.

It can be written as a sum of positive squares in 4 ways, for example, as 118069956 + 47748100 = 10866^2 + 6910^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61080 + ... + 63736.

Almost surely, 2^165818056 is an apocalyptic number.

It is an amenable number.

165818056 is a deficient number, since it is larger than the sum of its proper divisors (157128944).

165818056 is a wasteful number, since it uses less digits than its factorization.

165818056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2957 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 165818056 is about 12877.0359943583. The cubic root of 165818056 is about 549.3856015216.

The spelling of 165818056 in words is "one hundred sixty-five million, eight hundred eighteen thousand, fifty-six".