65520565 has 8 divisors (see below), whose sum is σ = 85772448. Its totient is φ = 47651280.

The previous prime is 65520563. The next prime is 65520571. The reversal of 65520565 is 56502556.

It is a happy number.

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

It is not a de Polignac number, because 65520565 - 2¹ = 65520563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65520565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65520563) 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, 595587 + ... + 595696.

It is an arithmetic number, because the mean of its divisors is an integer number (10721556).

Almost surely, 2^65520565 is an apocalyptic number.

It is an amenable number.

65520565 is a deficient number, since it is larger than the sum of its proper divisors (20251883).

65520565 is a wasteful number, since it uses less digits than its factorization.

65520565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191299.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 65520565 is about 8094.4774383526. The cubic root of 65520565 is about 403.1430816560.

Subtracting from 65520565 its reverse (56502556), we obtain a square (9018009 = 3003²).

The spelling of 65520565 in words is "sixty-five million, five hundred twenty thousand, five hundred sixty-five".