1966267841 has 2 divisors, whose sum is σ = 1966267842. Its totient is φ = 1966267840.

The previous prime is 1966267819. The next prime is 1966267867. The reversal of 1966267841 is 1487626691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1815100816 + 151167025 = 42604^2 + 12295^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966267841 - 2⁶ = 1966267777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1966267841.

It is not a weakly prime, because it can be changed into another prime (1966267741) 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, 983133920 + 983133921.

It is an arithmetic number, because the mean of its divisors is an integer number (983133921).

Almost surely, 2^1966267841 is an apocalyptic number.

It is an amenable number.

1966267841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966267841 is an equidigital number, since it uses as much as digits as its factorization.

1966267841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 1966267841 is about 44342.6187882493. The cubic root of 1966267841 is about 1252.7975404233.

The spelling of 1966267841 in words is "one billion, nine hundred sixty-six million, two hundred sixty-seven thousand, eight hundred forty-one".