1940319666 has 48 divisors (see below), whose sum is σ = 4335664320. Its totient is φ = 626831520.

The previous prime is 1940319643. The next prime is 1940319677. The reversal of 1940319666 is 6669130491.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62536 + ... + 88268.

It is an arithmetic number, because the mean of its divisors is an integer number (90326340).

Almost surely, 2^1940319666 is an apocalyptic number.

1940319666 is an abundant number, since it is smaller than the sum of its proper divisors (2395344654).

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

1940319666 is a wasteful number, since it uses less digits than its factorization.

1940319666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25871 (or 25868 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 1940319666 is about 44049.0597629507. The cubic root of 1940319666 is about 1247.2622033669.

The spelling of 1940319666 in words is "one billion, nine hundred forty million, three hundred nineteen thousand, six hundred sixty-six".