65565056 has 64 divisors (see below), whose sum is σ = 143208000. Its totient is φ = 29761536.

The previous prime is 65565053. The next prime is 65565077. The reversal of 65565056 is 65056556.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65565053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62585 + ... + 63623.

It is an arithmetic number, because the mean of its divisors is an integer number (2237625).

Almost surely, 2^65565056 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 65565056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71604000).

65565056 is an abundant number, since it is smaller than the sum of its proper divisors (77642944).

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

65565056 is a wasteful number, since it uses less digits than its factorization.

65565056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 65565056 is about 8097.2252037349. The cubic root of 65565056 is about 403.2343109292.

The spelling of 65565056 in words is "sixty-five million, five hundred sixty-five thousand, fifty-six".