65576720 has 80 divisors (see below), whose sum is σ = 170292672. Its totient is φ = 23278080.

The previous prime is 65576717. The next prime is 65576729. The reversal of 65576720 is 2767556.

65576720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (65576729) 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 15 ways as a sum of consecutive naturals, for example, 36974 + ... + 38706.

Almost surely, 2^65576720 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 65576720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85146336).

65576720 is an abundant number, since it is smaller than the sum of its proper divisors (104715952).

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

65576720 is a wasteful number, since it uses less digits than its factorization.

65576720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 65576720 is about 8097.9454184379. The cubic root of 65576720 is about 403.2582212579.

The spelling of 65576720 in words is "sixty-five million, five hundred seventy-six thousand, seven hundred twenty".