6500865 has 32 divisors (see below), whose sum is σ = 12024576. Its totient is φ = 2937600.

The previous prime is 6500861. The next prime is 6500873. The reversal of 6500865 is 5680056.

It is not a de Polignac number, because 6500865 - 2² = 6500861 is a prime.

It is a super-2 number, since 2×6500865² = 84522491496450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6500861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10299 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (375768).

Almost surely, 2^6500865 is an apocalyptic number.

It is an amenable number.

6500865 is a deficient number, since it is larger than the sum of its proper divisors (5523711).

6500865 is a wasteful number, since it uses less digits than its factorization.

6500865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 6500865 is about 2549.6793916099. The cubic root of 6500865 is about 186.6338359920.

The spelling of 6500865 in words is "six million, five hundred thousand, eight hundred sixty-five".