65505616 has 60 divisors (see below), whose sum is σ = 146267424. Its totient is φ = 28180800.

The previous prime is 65505589. The next prime is 65505647. The reversal of 65505616 is 61650556.

65505616 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 11 ways as a sum of consecutive naturals, for example, 63021 + ... + 64051.

Almost surely, 2^65505616 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 65505616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73133712).

65505616 is an abundant number, since it is smaller than the sum of its proper divisors (80761808).

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

65505616 is a wasteful number, since it uses less digits than its factorization.

65505616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1063 counting only the distinct ones).

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

The square root of 65505616 is about 8093.5539783213. The cubic root of 65505616 is about 403.1124193017.

The spelling of 65505616 in words is "sixty-five million, five hundred five thousand, six hundred sixteen".