65564216 has 8 divisors (see below), whose sum is σ = 122932920. Its totient is φ = 32782104.

The previous prime is 65564209. The next prime is 65564221. The reversal of 65564216 is 61246556.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4097756 + ... + 4097771.

It is an arithmetic number, because the mean of its divisors is an integer number (15366615).

Almost surely, 2^65564216 is an apocalyptic number.

It is an amenable number.

65564216 is a deficient number, since it is larger than the sum of its proper divisors (57368704).

65564216 is a wasteful number, since it uses less digits than its factorization.

65564216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195533 (or 8195529 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 65564216 is about 8097.1733339481. The cubic root of 65564216 is about 403.2325888825.

The spelling of 65564216 in words is "sixty-five million, five hundred sixty-four thousand, two hundred sixteen".