423445666 has 16 divisors (see below), whose sum is σ = 764112960. Its totient is φ = 171925200.

The previous prime is 423445661. The next prime is 423445681. The reversal of 423445666 is 666544324.

It is not an unprimeable number, because it can be changed into a prime (423445661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795685 + ... + 796216.

It is an arithmetic number, because the mean of its divisors is an integer number (47757060).

Almost surely, 2^423445666 is an apocalyptic number.

423445666 is a deficient number, since it is larger than the sum of its proper divisors (340667294).

423445666 is a wasteful number, since it uses less digits than its factorization.

423445666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591929.

The product of its digits is 414720, while the sum is 40.

The square root of 423445666 is about 20577.7954601556. The cubic root of 423445666 is about 750.9296123222.

The spelling of 423445666 in words is "four hundred twenty-three million, four hundred forty-five thousand, six hundred sixty-six".