165999996 has 24 divisors (see below), whose sum is σ = 430370640. Its totient is φ = 55333296.

The previous prime is 165999989. The next prime is 165999997. The reversal of 165999996 is 699999561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165999997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768411 + ... + 768626.

It is an arithmetic number, because the mean of its divisors is an integer number (17932110).

Almost surely, 2^165999996 is an apocalyptic number.

It is an amenable number.

165999996 is an abundant number, since it is smaller than the sum of its proper divisors (264370644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165999996 is a wasteful number, since it uses less digits than its factorization.

165999996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537050 (or 1537042 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 63.

The square root of 165999996 is about 12884.0985714950. The cubic root of 165999996 is about 549.5864615952.

The spelling of 165999996 in words is "one hundred sixty-five million, nine hundred ninety-nine thousand, nine hundred ninety-six".