65505665 has 8 divisors (see below), whose sum is σ = 79714368. Its totient is φ = 51666160.

The previous prime is 65505647. The next prime is 65505683. The reversal of 65505665 is 56650556.

It is a happy number.

65505665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65505647) and next prime (65505683).

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

It is not a de Polignac number, because 65505665 - 2⁸ = 65505409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 91907 + ... + 92616.

It is an arithmetic number, because the mean of its divisors is an integer number (9964296).

Almost surely, 2^65505665 is an apocalyptic number.

It is an amenable number.

65505665 is a deficient number, since it is larger than the sum of its proper divisors (14208703).

65505665 is a wasteful number, since it uses less digits than its factorization.

65505665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184599.

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 65505665 is about 8093.5570054210. The cubic root of 65505665 is about 403.1125198147.

The spelling of 65505665 in words is "sixty-five million, five hundred five thousand, six hundred sixty-five".