3663323221 has 4 divisors (see below), whose sum is σ = 3667345344. Its totient is φ = 3659301100.

The previous prime is 3663323207. The next prime is 3663323231. The reversal of 3663323221 is 1223233663.

3663323221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1223233663 = 163 ⋅7504501.

It is a cyclic number.

It is not a de Polignac number, because 3663323221 - 2⁷ = 3663323093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663323231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2009695 + ... + 2011516.

It is an arithmetic number, because the mean of its divisors is an integer number (916836336).

Almost surely, 2^3663323221 is an apocalyptic number.

It is an amenable number.

3663323221 is a deficient number, since it is larger than the sum of its proper divisors (4022123).

3663323221 is an equidigital number, since it uses as much as digits as its factorization.

3663323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022122.

The product of its digits is 23328, while the sum is 31.

The square root of 3663323221 is about 60525.3931916183. The cubic root of 3663323221 is about 1541.5528303161.

Adding to 3663323221 its reverse (1223233663), we get a palindrome (4886556884).

The spelling of 3663323221 in words is "three billion, six hundred sixty-three million, three hundred twenty-three thousand, two hundred twenty-one".