6565790213 has 2 divisors, whose sum is σ = 6565790214. Its totient is φ = 6565790212.

The previous prime is 6565790191. The next prime is 6565790221. The reversal of 6565790213 is 3120975656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5297219524 + 1268570689 = 72782^2 + 35617^2 .

It is a cyclic number.

It is not a de Polignac number, because 6565790213 - 2⁸ = 6565789957 is a prime.

It is a super-2 number, since 2×6565790213² = 86219202242253170738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6565790113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282895106 + 3282895107.

It is an arithmetic number, because the mean of its divisors is an integer number (3282895107).

Almost surely, 2^6565790213 is an apocalyptic number.

It is an amenable number.

6565790213 is a deficient number, since it is larger than the sum of its proper divisors (1).

6565790213 is an equidigital number, since it uses as much as digits as its factorization.

6565790213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 6565790213 is about 81029.5638208673. The cubic root of 6565790213 is about 1872.5309332306.

The spelling of 6565790213 in words is "six billion, five hundred sixty-five million, seven hundred ninety thousand, two hundred thirteen".