666574443 has 6 divisors (see below), whose sum is σ = 962829764. Its totient is φ = 444382956.

The previous prime is 666574439. The next prime is 666574453. The reversal of 666574443 is 344475666.

It is a happy number.

It is not a de Polignac number, because 666574443 - 2² = 666574439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666574423) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 37031905 + ... + 37031922.

Almost surely, 2^666574443 is an apocalyptic number.

666574443 is a deficient number, since it is larger than the sum of its proper divisors (296255321).

666574443 is a wasteful number, since it uses less digits than its factorization.

666574443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74063833 (or 74063830 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The square root of 666574443 is about 25818.1030093227. The cubic root of 666574443 is about 873.5401804819.

The spelling of 666574443 in words is "six hundred sixty-six million, five hundred seventy-four thousand, four hundred forty-three".