65502561 has 8 divisors (see below), whose sum is σ = 90348480. Its totient is φ = 42162512.

The previous prime is 65502559. The next prime is 65502589. The reversal of 65502561 is 16520556.

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

It is a cyclic number.

It is not a de Polignac number, because 65502561 - 2¹ = 65502559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65502061) 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, 376365 + ... + 376538.

It is an arithmetic number, because the mean of its divisors is an integer number (11293560).

Almost surely, 2^65502561 is an apocalyptic number.

It is an amenable number.

65502561 is a deficient number, since it is larger than the sum of its proper divisors (24845919).

65502561 is a wasteful number, since it uses less digits than its factorization.

65502561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752935.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 65502561 is about 8093.3652456812. The cubic root of 65502561 is about 403.1061525231.

The spelling of 65502561 in words is "sixty-five million, five hundred two thousand, five hundred sixty-one".