165994712 has 32 divisors (see below), whose sum is σ = 338521680. Its totient is φ = 75849600.

The previous prime is 165994709. The next prime is 165994723. The reversal of 165994712 is 217499561.

165994712 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 2603 + ... + 18405.

Almost surely, 2^165994712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165994712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169260840).

165994712 is an abundant number, since it is smaller than the sum of its proper divisors (172526968).

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

165994712 is a wasteful number, since it uses less digits than its factorization.

165994712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15923 (or 15919 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 165994712 is about 12883.8935108918. The cubic root of 165994712 is about 549.5806301780.

The spelling of 165994712 in words is "one hundred sixty-five million, nine hundred ninety-four thousand, seven hundred twelve".