1165681663 has 2 divisors, whose sum is σ = 1165681664. Its totient is φ = 1165681662.

The previous prime is 1165681609. The next prime is 1165681667. The reversal of 1165681663 is 3661865611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1165681663 - 2⁹ = 1165681151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165681667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582840831 + 582840832.

It is an arithmetic number, because the mean of its divisors is an integer number (582840832).

Almost surely, 2^1165681663 is an apocalyptic number.

1165681663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165681663 is an equidigital number, since it uses as much as digits as its factorization.

1165681663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 1165681663 is about 34142.0805312154. The cubic root of 1165681663 is about 1052.4302477457.

The spelling of 1165681663 in words is "one billion, one hundred sixty-five million, six hundred eighty-one thousand, six hundred sixty-three".