4334660821 has 2 divisors, whose sum is σ = 4334660822. Its totient is φ = 4334660820.

The previous prime is 4334660819. The next prime is 4334660849. The reversal of 4334660821 is 1280664334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2257580196 + 2077080625 = 47514^2 + 45575^2 .

It is a cyclic number.

It is not a de Polignac number, because 4334660821 - 2¹ = 4334660819 is a prime.

It is a super-2 number, since 2×4334660821² = 37578568866224788082, which contains 22 as substring.

Together with 4334660819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4334660921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2167330410 + 2167330411.

It is an arithmetic number, because the mean of its divisors is an integer number (2167330411).

Almost surely, 2^4334660821 is an apocalyptic number.

It is an amenable number.

4334660821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4334660821 is an equidigital number, since it uses as much as digits as its factorization.

4334660821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 4334660821 is about 65838.1410809874. The cubic root of 4334660821 is about 1630.4908781639.

The spelling of 4334660821 in words is "four billion, three hundred thirty-four million, six hundred sixty thousand, eight hundred twenty-one".