6605808165 has 48 divisors (see below), whose sum is σ = 12501867456. Its totient is φ = 3200025600.

The previous prime is 6605808163. The next prime is 6605808169. The reversal of 6605808165 is 5618085066.

6605808165 is a `hidden beast` number, since 6 + 6 + 0 + 580 + 8 + 1 + 65 = 666.

It is not a de Polignac number, because 6605808165 - 2¹ = 6605808163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6605808165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6605808163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 633877 + ... + 644213.

It is an arithmetic number, because the mean of its divisors is an integer number (260455572).

Almost surely, 2^6605808165 is an apocalyptic number.

It is an amenable number.

6605808165 is a deficient number, since it is larger than the sum of its proper divisors (5896059291).

6605808165 is a wasteful number, since it uses less digits than its factorization.

6605808165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11650 (or 11647 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 6605808165 is about 81276.1229697874. The cubic root of 6605808165 is about 1876.3275377214.

The spelling of 6605808165 in words is "six billion, six hundred five million, eight hundred eight thousand, one hundred sixty-five".