65528561 has 8 divisors (see below), whose sum is σ = 75393600. Its totient is φ = 55789488.

The previous prime is 65528539. The next prime is 65528581. The reversal of 65528561 is 16582556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65528561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65528501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30371 + ... + 32456.

It is an arithmetic number, because the mean of its divisors is an integer number (9424200).

Almost surely, 2^65528561 is an apocalyptic number.

It is an amenable number.

65528561 is a deficient number, since it is larger than the sum of its proper divisors (9865039).

65528561 is a wasteful number, since it uses less digits than its factorization.

65528561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62983.

The product of its digits is 72000, while the sum is 38.

The square root of 65528561 is about 8094.9713402828. The cubic root of 65528561 is about 403.1594805833.

The spelling of 65528561 in words is "sixty-five million, five hundred twenty-eight thousand, five hundred sixty-one".