65500566 has 8 divisors (see below), whose sum is σ = 131001144. Its totient is φ = 21833520.

The previous prime is 65500537. The next prime is 65500577. The reversal of 65500566 is 66500556.

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

65500566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5458375 + ... + 5458386.

It is an arithmetic number, because the mean of its divisors is an integer number (16375143).

Almost surely, 2^65500566 is an apocalyptic number.

65500566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65500566 is a wasteful number, since it uses less digits than its factorization.

65500566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10916766.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 65500566 is about 8093.2419956406. The cubic root of 65500566 is about 403.1020600371.

It can be divided in two parts, 65500 and 566, that added together give a palindrome (66066).

The spelling of 65500566 in words is "sixty-five million, five hundred thousand, five hundred sixty-six".