65165665 has 8 divisors (see below), whose sum is σ = 78254568. Its totient is φ = 52095360.

The previous prime is 65165663. The next prime is 65165671. The reversal of 65165665 is 56656156.

65165665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34562641 + 30603024 = 5879^2 + 5532^2 .

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

It is not a de Polignac number, because 65165665 - 2¹ = 65165663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65165663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4819 + ... + 12391.

It is an arithmetic number, because the mean of its divisors is an integer number (9781821).

Almost surely, 2^65165665 is an apocalyptic number.

It is an amenable number.

65165665 is a deficient number, since it is larger than the sum of its proper divisors (13088903).

65165665 is a wasteful number, since it uses less digits than its factorization.

65165665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9299.

The product of its digits is 162000, while the sum is 40.

The square root of 65165665 is about 8072.5253173960. The cubic root of 65165665 is about 402.4138724966.

The spelling of 65165665 in words is "sixty-five million, one hundred sixty-five thousand, six hundred sixty-five".