1166242643 has 2 divisors, whose sum is σ = 1166242644. Its totient is φ = 1166242642.

The previous prime is 1166242639. The next prime is 1166242673. The reversal of 1166242643 is 3462426611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166242643 - 2² = 1166242639 is a prime.

It is not a weakly prime, because it can be changed into another prime (1166242673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583121321 + 583121322.

It is an arithmetic number, because the mean of its divisors is an integer number (583121322).

Almost surely, 2^1166242643 is an apocalyptic number.

1166242643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166242643 is an equidigital number, since it uses as much as digits as its factorization.

1166242643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 1166242643 is about 34150.2949181995. The cubic root of 1166242643 is about 1052.5990467287.

The spelling of 1166242643 in words is "one billion, one hundred sixty-six million, two hundred forty-two thousand, six hundred forty-three".