6605865 has 48 divisors (see below), whose sum is σ = 13323648. Its totient is φ = 2965248.

The previous prime is 6605857. The next prime is 6605891. The reversal of 6605865 is 5685066.

It is not a de Polignac number, because 6605865 - 2³ = 6605857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20949 + ... + 21261.

It is an arithmetic number, because the mean of its divisors is an integer number (277576).

Almost surely, 2^6605865 is an apocalyptic number.

It is an amenable number.

6605865 is an abundant number, since it is smaller than the sum of its proper divisors (6717783).

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

6605865 is a wasteful number, since it uses less digits than its factorization.

6605865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6605865 is about 2570.1877363337. The cubic root of 6605865 is about 187.6332918883.

The spelling of 6605865 in words is "six million, six hundred five thousand, eight hundred sixty-five".