1966671915494 has 24 divisors (see below), whose sum is σ = 3484786068792. Its totient is φ = 825177025920.

The previous prime is 1966671915491. The next prime is 1966671915503. The reversal of 1966671915494 is 4945191766691.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966671915491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264476099 + ... + 264483534.

It is an arithmetic number, because the mean of its divisors is an integer number (145199419533).

Almost surely, 2^{1966671915494} is an apocalyptic number.

1966671915494 is a deficient number, since it is larger than the sum of its proper divisors (1518114153298).

1966671915494 is a wasteful number, since it uses less digits than its factorization.

1966671915494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528959672 (or 528959659 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 68.

The spelling of 1966671915494 in words is "one trillion, nine hundred sixty-six billion, six hundred seventy-one million, nine hundred fifteen thousand, four hundred ninety-four".