423420666 has 32 divisors (see below), whose sum is σ = 898413120. Its totient is φ = 132577536.

The previous prime is 423420631. The next prime is 423420691. The reversal of 423420666 is 666024324.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52000 + ... + 59588.

It is an arithmetic number, because the mean of its divisors is an integer number (28075410).

Almost surely, 2^423420666 is an apocalyptic number.

423420666 is an abundant number, since it is smaller than the sum of its proper divisors (474992454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423420666 is a wasteful number, since it uses less digits than its factorization.

423420666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8158.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 423420666 is about 20577.1880003075. The cubic root of 423420666 is about 750.9148338738.

The spelling of 423420666 in words is "four hundred twenty-three million, four hundred twenty thousand, six hundred sixty-six".