65475665 has 4 divisors (see below), whose sum is σ = 78570804. Its totient is φ = 52380528.

The previous prime is 65475643. The next prime is 65475667. The reversal of 65475665 is 56657456.

65475665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20866624 + 44609041 = 4568^2 + 6679^2 .

It is a cyclic number.

It is not a de Polignac number, because 65475665 - 2⁸ = 65475409 is a prime.

It is a super-3 number, since 3×65475665³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65475667) 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 3 ways as a sum of consecutive naturals, for example, 6547562 + ... + 6547571.

It is an arithmetic number, because the mean of its divisors is an integer number (19642701).

Almost surely, 2^65475665 is an apocalyptic number.

It is an amenable number.

65475665 is a deficient number, since it is larger than the sum of its proper divisors (13095139).

65475665 is a wasteful number, since it uses less digits than its factorization.

65475665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13095138.

The product of its digits is 756000, while the sum is 44.

The square root of 65475665 is about 8091.7034671322. The cubic root of 65475665 is about 403.0509718442.

The spelling of 65475665 in words is "sixty-five million, four hundred seventy-five thousand, six hundred sixty-five".