6565005061 has 2 divisors, whose sum is σ = 6565005062. Its totient is φ = 6565005060.

The previous prime is 6565005049. The next prime is 6565005089. The reversal of 6565005061 is 1605005656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4449557025 + 2115448036 = 66705^2 + 45994^2 .

It is a cyclic number.

It is not a de Polignac number, because 6565005061 - 2⁹ = 6565004549 is a prime.

It is a super-2 number, since 2×6565005061² = 86198582901911227442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6565005011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282502530 + 3282502531.

It is an arithmetic number, because the mean of its divisors is an integer number (3282502531).

Almost surely, 2^6565005061 is an apocalyptic number.

It is an amenable number.

6565005061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6565005061 is an equidigital number, since it uses as much as digits as its factorization.

6565005061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 6565005061 is about 81024.7188270345. The cubic root of 6565005061 is about 1872.4562897647.

The spelling of 6565005061 in words is "six billion, five hundred sixty-five million, five thousand, sixty-one".