165865528 has 8 divisors (see below), whose sum is σ = 310997880. Its totient is φ = 82932760.

The previous prime is 165865501. The next prime is 165865537. The reversal of 165865528 is 825568561.

It is a happy number.

165865528 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×165865528² = 55022746757437568, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 10366588 + ... + 10366603.

It is an arithmetic number, because the mean of its divisors is an integer number (38874735).

Almost surely, 2^165865528 is an apocalyptic number.

It is an amenable number.

165865528 is a deficient number, since it is larger than the sum of its proper divisors (145132352).

165865528 is a wasteful number, since it uses less digits than its factorization.

165865528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20733197 (or 20733193 counting only the distinct ones).

The product of its digits is 576000, while the sum is 46.

The square root of 165865528 is about 12878.8791437764. The cubic root of 165865528 is about 549.4380243306.

The spelling of 165865528 in words is "one hundred sixty-five million, eight hundred sixty-five thousand, five hundred twenty-eight".