1966383685 has 24 divisors (see below), whose sum is σ = 2771677440. Its totient is φ = 1311902784.

The previous prime is 1966383677. The next prime is 1966383721. The reversal of 1966383685 is 5863836691.

It is not a de Polignac number, because 1966383685 - 2³ = 1966383677 is a prime.

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, 27396 + ... + 68434.

It is an arithmetic number, because the mean of its divisors is an integer number (115486560).

Almost surely, 2^1966383685 is an apocalyptic number.

It is an amenable number.

1966383685 is a deficient number, since it is larger than the sum of its proper divisors (805293755).

1966383685 is an equidigital number, since it uses as much as digits as its factorization.

1966383685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41125 (or 41088 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The square root of 1966383685 is about 44343.9250067019. The cubic root of 1966383685 is about 1252.8221430783.

The spelling of 1966383685 in words is "one billion, nine hundred sixty-six million, three hundred eighty-three thousand, six hundred eighty-five".