1966968859 has 2 divisors, whose sum is σ = 1966968860. Its totient is φ = 1966968858.

The previous prime is 1966968853. The next prime is 1966968889. The reversal of 1966968859 is 9588696691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1966968859 - 2⁵ = 1966968827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1966968794 and 1966968803.

It is not a weakly prime, because it can be changed into another prime (1966968853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983484429 + 983484430.

It is an arithmetic number, because the mean of its divisors is an integer number (983484430).

Almost surely, 2^1966968859 is an apocalyptic number.

1966968859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966968859 is an equidigital number, since it uses as much as digits as its factorization.

1966968859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50388480, while the sum is 67.

The square root of 1966968859 is about 44350.5226463003. The cubic root of 1966968859 is about 1252.9464060828.

The spelling of 1966968859 in words is "one billion, nine hundred sixty-six million, nine hundred sixty-eight thousand, eight hundred fifty-nine".