65560561 has 8 divisors (see below), whose sum is σ = 73987200. Its totient is φ = 57545040.

The previous prime is 65560519. The next prime is 65560589. The reversal of 65560561 is 16506556.

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

It is a cyclic number.

It is not a de Polignac number, because 65560561 - 2⁷ = 65560433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65560501) 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, 102441 + ... + 103078.

It is an arithmetic number, because the mean of its divisors is an integer number (9248400).

Almost surely, 2^65560561 is an apocalyptic number.

It is an amenable number.

65560561 is a deficient number, since it is larger than the sum of its proper divisors (8426639).

65560561 is a wasteful number, since it uses less digits than its factorization.

65560561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205559.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 65560561 is about 8096.9476347572. The cubic root of 65560561 is about 403.2250957580.

It can be divided in two parts, 655 and 60561, that added together give a palindrome (61216).

The spelling of 65560561 in words is "sixty-five million, five hundred sixty thousand, five hundred sixty-one".