65505005 has 8 divisors (see below), whose sum is σ = 78933624. Its totient is φ = 52185600.

The previous prime is 65504977. The next prime is 65505007. The reversal of 65505005 is 50050556.

It can be written as a sum of positive squares in 4 ways, for example, as 14853316 + 50651689 = 3854^2 + 7117^2 .

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

It is not a de Polignac number, because 65505005 - 2⁶ = 65504941 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 (65505007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25976 + ... + 28385.

It is an arithmetic number, because the mean of its divisors is an integer number (9866703).

Almost surely, 2^65505005 is an apocalyptic number.

It is an amenable number.

65505005 is a deficient number, since it is larger than the sum of its proper divisors (13428619).

65505005 is a wasteful number, since it uses less digits than its factorization.

65505005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54607.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 65505005 is about 8093.5162321453. The cubic root of 65505005 is about 403.1111659616. Note that the first 4 decimals are identical.

The spelling of 65505005 in words is "sixty-five million, five hundred five thousand, five".