65612616 has 64 divisors (see below), whose sum is σ = 175219200. Its totient is φ = 20428800.

The previous prime is 65612609. The next prime is 65612633. The reversal of 65612616 is 61621656.

65612616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 20056 + ... + 23096.

It is an arithmetic number, because the mean of its divisors is an integer number (2737800).

Almost surely, 2^65612616 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 65612616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87609600).

65612616 is an abundant number, since it is smaller than the sum of its proper divisors (109606584).

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

65612616 is a wasteful number, since it uses less digits than its factorization.

65612616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110 (or 3106 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 65612616 is about 8100.1614798719. The cubic root of 65612616 is about 403.3317875921.

The spelling of 65612616 in words is "sixty-five million, six hundred twelve thousand, six hundred sixteen".