1324663661 has 2 divisors, whose sum is σ = 1324663662. Its totient is φ = 1324663660.

The previous prime is 1324663643. The next prime is 1324663663. The reversal of 1324663661 is 1663664231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 675688036 + 648975625 = 25994^2 + 25475^2 .

It is an emirp because it is prime and its reverse (1663664231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1324663661 - 2¹⁴ = 1324647277 is a prime.

Together with 1324663663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1324663663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662331830 + 662331831.

It is an arithmetic number, because the mean of its divisors is an integer number (662331831).

Almost surely, 2^1324663661 is an apocalyptic number.

It is an amenable number.

1324663661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1324663661 is an equidigital number, since it uses as much as digits as its factorization.

1324663661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 38.

The square root of 1324663661 is about 36395.9291817093. The cubic root of 1324663661 is about 1098.2516747737.

The spelling of 1324663661 in words is "one billion, three hundred twenty-four million, six hundred sixty-three thousand, six hundred sixty-one".