669675446 has 32 divisors (see below), whose sum is σ = 1117026720. Its totient is φ = 298540800.

The previous prime is 669675431. The next prime is 669675449. The reversal of 669675446 is 644576966.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669675449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763160 + ... + 764036.

It is an arithmetic number, because the mean of its divisors is an integer number (34907085).

Almost surely, 2^669675446 is an apocalyptic number.

669675446 is a deficient number, since it is larger than the sum of its proper divisors (447351274).

669675446 is a wasteful number, since it uses less digits than its factorization.

669675446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520.

The product of its digits is 6531840, while the sum is 53.

The square root of 669675446 is about 25878.0881442196. The cubic root of 669675446 is about 874.8926980257.

The spelling of 669675446 in words is "six hundred sixty-nine million, six hundred seventy-five thousand, four hundred forty-six".