65604920 has 64 divisors (see below), whose sum is σ = 153014400. Its totient is φ = 25297920.

The previous prime is 65604907. The next prime is 65604977. The reversal of 65604920 is 2940656.

65604920 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 15 ways as a sum of consecutive naturals, for example, 178577 + ... + 178943.

It is an arithmetic number, because the mean of its divisors is an integer number (2390850).

Almost surely, 2^65604920 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 65604920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76507200).

65604920 is an abundant number, since it is smaller than the sum of its proper divisors (87409480).

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

65604920 is a wasteful number, since it uses less digits than its factorization.

65604920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65604920 is about 8099.6864136829. The cubic root of 65604920 is about 403.3160174399.

The spelling of 65604920 in words is "sixty-five million, six hundred four thousand, nine hundred twenty".