6605555165 has 24 divisors (see below), whose sum is σ = 8771376600. Its totient is φ = 4771733120.

The previous prime is 6605555119. The next prime is 6605555171. The reversal of 6605555165 is 5615555066.

It can be written as a sum of positive squares in 4 ways, for example, as 49252324 + 6556302841 = 7018^2 + 80971^2 .

It is not a de Polignac number, because 6605555165 - 2¹⁶ = 6605489629 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53507 + ... + 126783.

It is an arithmetic number, because the mean of its divisors is an integer number (365474025).

Almost surely, 2^6605555165 is an apocalyptic number.

It is an amenable number.

6605555165 is a deficient number, since it is larger than the sum of its proper divisors (2165821435).

6605555165 is a wasteful number, since it uses less digits than its factorization.

6605555165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73453 (or 73442 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The square root of 6605555165 is about 81274.5665322184. The cubic root of 6605555165 is about 1876.3035831996.

Subtracting from 6605555165 its reverse (5615555066), we obtain a palindrome (990000099).

The spelling of 6605555165 in words is "six billion, six hundred five million, five hundred fifty-five thousand, one hundred sixty-five".