65564843 has 2 divisors, whose sum is σ = 65564844. Its totient is φ = 65564842.

The previous prime is 65564797. The next prime is 65564861. The reversal of 65564843 is 34846556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65564843 - 2¹⁶ = 65499307 is a prime.

It is a super-2 number, since 2×65564843² = 8597497275229298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65564843.

It is not a weakly prime, because it can be changed into another prime (65564243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32782421 + 32782422.

It is an arithmetic number, because the mean of its divisors is an integer number (32782422).

Almost surely, 2^65564843 is an apocalyptic number.

65564843 is a deficient number, since it is larger than the sum of its proper divisors (1).

65564843 is an equidigital number, since it uses as much as digits as its factorization.

65564843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The square root of 65564843 is about 8097.2120510704. The cubic root of 65564843 is about 403.2338742687.

The spelling of 65564843 in words is "sixty-five million, five hundred sixty-four thousand, eight hundred forty-three".