4664000221 has 2 divisors, whose sum is σ = 4664000222. Its totient is φ = 4664000220.

The previous prime is 4664000219. The next prime is 4664000227. The reversal of 4664000221 is 1220004664.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4531174596 + 132825625 = 67314^2 + 11525^2 .

It is a cyclic number.

It is not a de Polignac number, because 4664000221 - 2¹ = 4664000219 is a prime.

It is a super-2 number, since 2×4664000221² = 43505796122976097682, which contains 22 as substring.

Together with 4664000219, 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 (4664000227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2332000110 + 2332000111.

It is an arithmetic number, because the mean of its divisors is an integer number (2332000111).

Almost surely, 2^4664000221 is an apocalyptic number.

It is an amenable number.

4664000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4664000221 is an equidigital number, since it uses as much as digits as its factorization.

4664000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 4664000221 is about 68293.4859338722. The cubic root of 4664000221 is about 1670.7809727649.

Adding to 4664000221 its reverse (1220004664), we get a palindrome (5884004885).

The spelling of 4664000221 in words is "four billion, six hundred sixty-four million, two hundred twenty-one", and thus it is an aban number.