669443194 has 24 divisors (see below), whose sum is σ = 1169689248. Its totient is φ = 286516440.

The previous prime is 669443189. The next prime is 669443213. The reversal of 669443194 is 491344966.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75267 + ... + 83689.

It is an arithmetic number, because the mean of its divisors is an integer number (48737052).

Almost surely, 2^669443194 is an apocalyptic number.

669443194 is a deficient number, since it is larger than the sum of its proper divisors (500246054).

669443194 is a wasteful number, since it uses less digits than its factorization.

669443194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250 (or 9243 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 669443194 is about 25873.6003292932. The cubic root of 669443194 is about 874.7915450095.

The spelling of 669443194 in words is "six hundred sixty-nine million, four hundred forty-three thousand, one hundred ninety-four".