65564 has 12 divisors (see below), whose sum is σ = 118104. Its totient is φ = 31824.

The previous prime is 65563. The next prime is 65579. The reversal of 65564 is 46556.

65564 = 87² + 88² + ... + 94².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74 + ... + 369.

It is an arithmetic number, because the mean of its divisors is an integer number (9842).

2⁶⁵⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

65564 is a deficient number, since it is larger than the sum of its proper divisors (52540).

65564 is a wasteful number, since it uses less digits than its factorization.

65564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 482 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 65564 is about 256.0546816600. The cubic root of 65564 is about 40.3232146068.

The spelling of 65564 in words is "sixty-five thousand, five hundred sixty-four".