65525565 has 32 divisors (see below), whose sum is σ = 126869760. Its totient is φ = 28191744.

The previous prime is 65525533. The next prime is 65525609. The reversal of 65525565 is 56552556.

It is not a de Polignac number, because 65525565 - 2⁵ = 65525533 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16570 + ... + 20139.

It is an arithmetic number, because the mean of its divisors is an integer number (3964680).

Almost surely, 2^65525565 is an apocalyptic number.

It is an amenable number.

65525565 is a deficient number, since it is larger than the sum of its proper divisors (61344195).

65525565 is a wasteful number, since it uses less digits than its factorization.

65525565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36741.

The product of its digits is 225000, while the sum is 39.

The square root of 65525565 is about 8094.7862850109. The cubic root of 65525565 is about 403.1533362691.

The spelling of 65525565 in words is "sixty-five million, five hundred twenty-five thousand, five hundred sixty-five".