1966913784 has 96 divisors (see below), whose sum is σ = 5968488240. Its totient is φ = 579916800.

The previous prime is 1966913771. The next prime is 1966913803. The reversal of 1966913784 is 4873196691.

It is a self number, because there is not a number n which added to its sum of digits gives 1966913784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4257 + ... + 62864.

Almost surely, 2^1966913784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966913784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2984244120).

1966913784 is an abundant number, since it is smaller than the sum of its proper divisors (4001574456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1966913784 is a wasteful number, since it uses less digits than its factorization.

1966913784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67181 (or 67174 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1966913784 is about 44349.9017360805. The cubic root of 1966913784 is about 1252.9347118344.

The spelling of 1966913784 in words is "one billion, nine hundred sixty-six million, nine hundred thirteen thousand, seven hundred eighty-four".