669884194 has 24 divisors (see below), whose sum is σ = 1172307600. Its totient is φ = 286251336.

The previous prime is 669884179. The next prime is 669884207. The reversal of 669884194 is 491488966.

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, 24157 + ... + 43855.

It is an arithmetic number, because the mean of its divisors is an integer number (48846150).

Almost surely, 2^669884194 is an apocalyptic number.

669884194 is a deficient number, since it is larger than the sum of its proper divisors (502423406).

669884194 is a wasteful number, since it uses less digits than its factorization.

669884194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20062 (or 20055 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 669884194 is about 25882.1211263683. The cubic root of 669884194 is about 874.9835943591.

The spelling of 669884194 in words is "six hundred sixty-nine million, eight hundred eighty-four thousand, one hundred ninety-four".