1320746663 has 2 divisors, whose sum is σ = 1320746664. Its totient is φ = 1320746662.

The previous prime is 1320746659. The next prime is 1320746729. The reversal of 1320746663 is 3666470231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320746663 - 2² = 1320746659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320746633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660373331 + 660373332.

It is an arithmetic number, because the mean of its divisors is an integer number (660373332).

Almost surely, 2^1320746663 is an apocalyptic number.

1320746663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320746663 is an equidigital number, since it uses as much as digits as its factorization.

1320746663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 1320746663 is about 36342.0784078181. The cubic root of 1320746663 is about 1097.1681049402.

The spelling of 1320746663 in words is "one billion, three hundred twenty million, seven hundred forty-six thousand, six hundred sixty-three".