663325605541 has 2 divisors, whose sum is σ = 663325605542. Its totient is φ = 663325605540.

The previous prime is 663325605533. The next prime is 663325605559. The reversal of 663325605541 is 145506523366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355138524225 + 308187081316 = 595935^2 + 555146^2 .

It is a cyclic number.

It is not a de Polignac number, because 663325605541 - 2³ = 663325605533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663325605491 and 663325605500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663325605941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331662802770 + 331662802771.

It is an arithmetic number, because the mean of its divisors is an integer number (331662802771).

Almost surely, 2^663325605541 is an apocalyptic number.

It is an amenable number.

663325605541 is a deficient number, since it is larger than the sum of its proper divisors (1).

663325605541 is an equidigital number, since it uses as much as digits as its factorization.

663325605541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 663325605541 in words is "six hundred sixty-three billion, three hundred twenty-five million, six hundred five thousand, five hundred forty-one".