65564263 has 4 divisors (see below), whose sum is σ = 66165880. Its totient is φ = 64962648.

The previous prime is 65564243. The next prime is 65564267. The reversal of 65564263 is 36246556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65564263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65564267) 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, 300645 + ... + 300862.

It is an arithmetic number, because the mean of its divisors is an integer number (16541470).

Almost surely, 2^65564263 is an apocalyptic number.

65564263 is a deficient number, since it is larger than the sum of its proper divisors (601617).

65564263 is a wasteful number, since it uses less digits than its factorization.

65564263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601616.

The product of its digits is 129600, while the sum is 37.

The square root of 65564263 is about 8097.1762361949. The cubic root of 65564263 is about 403.2326852355.

The spelling of 65564263 in words is "sixty-five million, five hundred sixty-four thousand, two hundred sixty-three".