6605440165 has 8 divisors (see below), whose sum is σ = 8182222848. Its totient is φ = 5113889040.

The previous prime is 6605440129. The next prime is 6605440169. The reversal of 6605440165 is 5610445066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6605440165 - 2⁹ = 6605439653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6605440169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21307717 + ... + 21308026.

It is an arithmetic number, because the mean of its divisors is an integer number (1022777856).

Almost surely, 2^6605440165 is an apocalyptic number.

It is an amenable number.

6605440165 is a deficient number, since it is larger than the sum of its proper divisors (1576782683).

6605440165 is a wasteful number, since it uses less digits than its factorization.

6605440165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42615779.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 6605440165 is about 81273.8590507428. The cubic root of 6605440165 is about 1876.2926945784.

The spelling of 6605440165 in words is "six billion, six hundred five million, four hundred forty thousand, one hundred sixty-five".