65564856 has 128 divisors (see below), whose sum is σ = 210662400. Its totient is φ = 18506880.

The previous prime is 65564843. The next prime is 65564861. The reversal of 65564856 is 65846556.

It is a happy number.

65564856 is a `hidden beast` number, since 6 + 5 + 564 + 85 + 6 = 666.

65564856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 155526 + ... + 155946.

It is an arithmetic number, because the mean of its divisors is an integer number (1645800).

Almost surely, 2^65564856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65564856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105331200).

65564856 is an abundant number, since it is smaller than the sum of its proper divisors (145097544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65564856 is a wasteful number, since it uses less digits than its factorization.

65564856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 536 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 65564856 is about 8097.2128538158. The cubic root of 65564856 is about 403.2339009194.

The spelling of 65564856 in words is "sixty-five million, five hundred sixty-four thousand, eight hundred fifty-six".