2065664219 has 2 divisors, whose sum is σ = 2065664220. Its totient is φ = 2065664218.

The previous prime is 2065664191. The next prime is 2065664233. The reversal of 2065664219 is 9124665602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065664219 is a prime.

It is a super-2 number, since 2×2065664219² = 8533937331313759922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2065664239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1032832109 + 1032832110.

It is an arithmetic number, because the mean of its divisors is an integer number (1032832110).

Almost surely, 2^2065664219 is an apocalyptic number.

2065664219 is a deficient number, since it is larger than the sum of its proper divisors (1).

2065664219 is an equidigital number, since it uses as much as digits as its factorization.

2065664219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 2065664219 is about 45449.5788649356. The cubic root of 2065664219 is about 1273.5614623212.

The spelling of 2065664219 in words is "two billion, sixty-five million, six hundred sixty-four thousand, two hundred nineteen".