1966968879 has 8 divisors (see below), whose sum is σ = 2707226112. Its totient is φ = 1269012120.

The previous prime is 1966968859. The next prime is 1966968889. The reversal of 1966968879 is 9788696691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1966968879 - 2²⁰ = 1965920303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966968859) 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 in 7 ways as a sum of consecutive naturals, for example, 10575009 + ... + 10575194.

It is an arithmetic number, because the mean of its divisors is an integer number (338403264).

Almost surely, 2^1966968879 is an apocalyptic number.

1966968879 is a deficient number, since it is larger than the sum of its proper divisors (740257233).

1966968879 is a wasteful number, since it uses less digits than its factorization.

1966968879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21150237.

The product of its digits is 70543872, while the sum is 69.

The square root of 1966968879 is about 44350.5228717768. The cubic root of 1966968879 is about 1252.9464103295.

The spelling of 1966968879 in words is "one billion, nine hundred sixty-six million, nine hundred sixty-eight thousand, eight hundred seventy-nine".