1966256443 has 2 divisors, whose sum is σ = 1966256444. Its totient is φ = 1966256442.

The previous prime is 1966256423. The next prime is 1966256447. The reversal of 1966256443 is 3446526691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1966256443 - 2⁹ = 1966255931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1966256393 and 1966256402.

It is not a weakly prime, because it can be changed into another prime (1966256447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983128221 + 983128222.

It is an arithmetic number, because the mean of its divisors is an integer number (983128222).

Almost surely, 2^1966256443 is an apocalyptic number.

1966256443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966256443 is an equidigital number, since it uses as much as digits as its factorization.

1966256443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 46.

The square root of 1966256443 is about 44342.4902661093. The cubic root of 1966256443 is about 1252.7951196927.

The spelling of 1966256443 in words is "one billion, nine hundred sixty-six million, two hundred fifty-six thousand, four hundred forty-three".