165997316 has 24 divisors (see below), whose sum is σ = 307994400. Its totient is φ = 78012032.

The previous prime is 165997303. The next prime is 165997327. The reversal of 165997316 is 613799561.

It is a happy number.

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, 78035 + ... + 80133.

It is an arithmetic number, because the mean of its divisors is an integer number (12833100).

Almost surely, 2^165997316 is an apocalyptic number.

It is an amenable number.

165997316 is a deficient number, since it is larger than the sum of its proper divisors (141997084).

165997316 is a wasteful number, since it uses less digits than its factorization.

165997316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283 (or 3281 counting only the distinct ones).

The product of its digits is 306180, while the sum is 47.

The square root of 165997316 is about 12883.9945669035. The cubic root of 165997316 is about 549.5835039653.

The spelling of 165997316 in words is "one hundred sixty-five million, nine hundred ninety-seven thousand, three hundred sixteen".