65305665 has 12 divisors (see below), whose sum is σ = 113196564. Its totient is φ = 34829664.

The previous prime is 65305663. The next prime is 65305673. The reversal of 65305665 is 56650356.

It is a happy number.

65305665 is a `hidden beast` number, since 65 + 30 + 566 + 5 = 666.

65305665 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 2 ways, for example, as 47941776 + 17363889 = 6924^2 + 4167^2 .

It is not a de Polignac number, because 65305665 - 2¹ = 65305663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65305663) 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 11 ways as a sum of consecutive naturals, for example, 725574 + ... + 725663.

It is an arithmetic number, because the mean of its divisors is an integer number (9433047).

Almost surely, 2^65305665 is an apocalyptic number.

It is an amenable number.

65305665 is a deficient number, since it is larger than the sum of its proper divisors (47890899).

65305665 is a wasteful number, since it uses less digits than its factorization.

65305665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451248 (or 1451245 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 65305665 is about 8081.1920531565. The cubic root of 65305665 is about 402.7018444182.

The spelling of 65305665 in words is "sixty-five million, three hundred five thousand, six hundred sixty-five".