165990008 has 8 divisors (see below), whose sum is σ = 311231280. Its totient is φ = 82995000.

The previous prime is 165989987. The next prime is 165990037. The reversal of 165990008 is 800099561.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374368 + ... + 10374383.

It is an arithmetic number, because the mean of its divisors is an integer number (38903910).

Almost surely, 2^165990008 is an apocalyptic number.

It is an amenable number.

165990008 is a deficient number, since it is larger than the sum of its proper divisors (145241272).

165990008 is a wasteful number, since it uses less digits than its factorization.

165990008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20748757 (or 20748753 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 165990008 is about 12883.7109560871. The cubic root of 165990008 is about 549.5754387441.

The spelling of 165990008 in words is "one hundred sixty-five million, nine hundred ninety thousand, eight".