65945720 has 32 divisors (see below), whose sum is σ = 157107600. Its totient is φ = 24826368.

The previous prime is 65945717. The next prime is 65945743. The reversal of 65945720 is 2754956.

It is a happy number.

65945720 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 7 ways as a sum of consecutive naturals, for example, 47810 + ... + 49169.

Almost surely, 2^65945720 is an apocalyptic number.

It is an amenable number.

65945720 is an abundant number, since it is smaller than the sum of its proper divisors (91161880).

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

65945720 is a wasteful number, since it uses less digits than its factorization.

65945720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97007 (or 97003 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 65945720 is about 8120.6970144194. The cubic root of 65945720 is about 404.0131845516.

The spelling of 65945720 in words is "sixty-five million, nine hundred forty-five thousand, seven hundred twenty".