165990316 has 24 divisors (see below), whose sum is σ = 301749840. Its totient is φ = 79800000.

The previous prime is 165990313. The next prime is 165990317. The reversal of 165990316 is 613099561.

It is not an unprimeable number, because it can be changed into a prime (165990313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26266 + ... + 31966.

It is an arithmetic number, because the mean of its divisors is an integer number (12572910).

Almost surely, 2^165990316 is an apocalyptic number.

It is an amenable number.

165990316 is a deficient number, since it is larger than the sum of its proper divisors (135759524).

165990316 is a wasteful number, since it uses less digits than its factorization.

165990316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5985 (or 5983 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 165990316 is about 12883.7229091594. The cubic root of 165990316 is about 549.5757786624.

The spelling of 165990316 in words is "one hundred sixty-five million, nine hundred ninety thousand, three hundred sixteen".