1328611663 has 2 divisors, whose sum is σ = 1328611664. Its totient is φ = 1328611662.

The previous prime is 1328611657. The next prime is 1328611667. The reversal of 1328611663 is 3661168231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1328611663 - 2⁵ = 1328611631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1328611667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664305831 + 664305832.

It is an arithmetic number, because the mean of its divisors is an integer number (664305832).

Almost surely, 2^1328611663 is an apocalyptic number.

1328611663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328611663 is an equidigital number, since it uses as much as digits as its factorization.

1328611663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 1328611663 is about 36450.1256925131. The cubic root of 1328611663 is about 1099.3416619933.

Adding to 1328611663 its reverse (3661168231), we get a palindrome (4989779894).

The spelling of 1328611663 in words is "one billion, three hundred twenty-eight million, six hundred eleven thousand, six hundred sixty-three".