5663400221 has 2 divisors, whose sum is σ = 5663400222. Its totient is φ = 5663400220.

The previous prime is 5663400217. The next prime is 5663400229. The reversal of 5663400221 is 1220043665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4497177721 + 1166222500 = 67061^2 + 34150^2 .

It is a cyclic number.

It is not a de Polignac number, because 5663400221 - 2² = 5663400217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5663400229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2831700110 + 2831700111.

It is an arithmetic number, because the mean of its divisors is an integer number (2831700111).

Almost surely, 2^5663400221 is an apocalyptic number.

It is an amenable number.

5663400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5663400221 is an equidigital number, since it uses as much as digits as its factorization.

5663400221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 5663400221 is about 75255.5660466387. The cubic root of 5663400221 is about 1782.4844552895.

Adding to 5663400221 its reverse (1220043665), we get a palindrome (6883443886).

The spelling of 5663400221 in words is "five billion, six hundred sixty-three million, four hundred thousand, two hundred twenty-one".