65570728 has 16 divisors (see below), whose sum is σ = 123772500. Its totient is φ = 32564736.

The previous prime is 65570707. The next prime is 65570741. The reversal of 65570728 is 82707556.

65570728 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 2 ways, for example, as 65318724 + 252004 = 8082^2 + 502^2 .

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 3 ways as a sum of consecutive naturals, for example, 26313 + ... + 28696.

Almost surely, 2^65570728 is an apocalyptic number.

It is an amenable number.

65570728 is a deficient number, since it is larger than the sum of its proper divisors (58201772).

65570728 is a wasteful number, since it uses less digits than its factorization.

65570728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55164 (or 55160 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 65570728 is about 8097.5754395992. The cubic root of 65570728 is about 403.2459384597.

The spelling of 65570728 in words is "sixty-five million, five hundred seventy thousand, seven hundred twenty-eight".