65872720 has 40 divisors (see below), whose sum is σ = 153773640. Its totient is φ = 26242560.

The previous prime is 65872699. The next prime is 65872721. The reversal of 65872720 is 2727856.

65872720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7441984 + 58430736 = 2728^2 + 7644^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 65872720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65872721) by changing a digit.

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, 19990 + ... + 23050.

It is an arithmetic number, because the mean of its divisors is an integer number (3844341).

Almost surely, 2^65872720 is an apocalyptic number.

It is an amenable number.

65872720 is an abundant number, since it is smaller than the sum of its proper divisors (87900920).

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

65872720 is a wasteful number, since it uses less digits than its factorization.

65872720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 65872720 is about 8116.2010817870. The cubic root of 65872720 is about 403.8640525493.

The spelling of 65872720 in words is "sixty-five million, eight hundred seventy-two thousand, seven hundred twenty".