4065066221 has 2 divisors, whose sum is σ = 4065066222. Its totient is φ = 4065066220.

The previous prime is 4065066199. The next prime is 4065066223. The reversal of 4065066221 is 1226605604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3719292196 + 345774025 = 60986^2 + 18595^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065066221 - 2¹⁸ = 4064804077 is a prime.

It is a super-2 number, since 2×4065066221² = 33049526762230441682, which contains 22 as substring.

Together with 4065066223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4065066223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032533110 + 2032533111.

It is an arithmetic number, because the mean of its divisors is an integer number (2032533111).

Almost surely, 2^4065066221 is an apocalyptic number.

It is an amenable number.

4065066221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4065066221 is an equidigital number, since it uses as much as digits as its factorization.

4065066221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4065066221 is about 63757.8718355624. The cubic root of 4065066221 is about 1595.9619817714.

The spelling of 4065066221 in words is "four billion, sixty-five million, sixty-six thousand, two hundred twenty-one".