165000065 has 8 divisors (see below), whose sum is σ = 198178728. Its totient is φ = 131880960.

The previous prime is 165000041. The next prime is 165000071. The reversal of 165000065 is 560000561.

165000065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 162231169 = 1664^2 + 12737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165000065 - 2¹² = 164995969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165000065.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8546 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (24772341).

Almost surely, 2^165000065 is an apocalyptic number.

It is an amenable number.

165000065 is a deficient number, since it is larger than the sum of its proper divisors (33178663).

165000065 is a wasteful number, since it uses less digits than its factorization.

165000065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29779.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 165000065 is about 12845.2351087864. The cubic root of 165000065 is about 548.4807272660.

The spelling of 165000065 in words is "one hundred sixty-five million, sixty-five", and thus it is an aban number.