65000065 has 16 divisors (see below), whose sum is σ = 84840336. Its totient is φ = 47520000.

The previous prime is 65000063. The next prime is 65000071. The reversal of 65000065 is 56000056.

It can be written as a sum of positive squares in 8 ways, for example, as 6385729 + 58614336 = 2527^2 + 7656^2 .

It is not a de Polignac number, because 65000065 - 2¹ = 65000063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65000063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615 + ... + 11515.

It is an arithmetic number, because the mean of its divisors is an integer number (5302521).

Almost surely, 2^65000065 is an apocalyptic number.

65000065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65000065 is a deficient number, since it is larger than the sum of its proper divisors (19840271).

65000065 is a wasteful number, since it uses less digits than its factorization.

65000065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10020.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 65000065 is about 8062.2617794264. The cubic root of 65000065 is about 402.0727098831.

Adding to 65000065 its reverse (56000056), we get a palindrome (121000121).

Subtracting from 65000065 its reverse (56000056), we obtain a palindrome (9000009).

It can be divided in two parts, 650000 and 65, that multiplied together give a square (42250000 = 6500²).

The spelling of 65000065 in words is "sixty-five million, sixty-five", and thus it is an aban number and an uban number.