423566660 has 48 divisors (see below), whose sum is σ = 973812672. Its totient is φ = 153475200.

The previous prime is 423566657. The next prime is 423566719. The reversal of 423566660 is 66665324.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61175 + ... + 67745.

It is an arithmetic number, because the mean of its divisors is an integer number (20287764).

Almost surely, 2^423566660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423566660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486906336).

423566660 is an abundant number, since it is smaller than the sum of its proper divisors (550246012).

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

423566660 is a wasteful number, since it uses less digits than its factorization.

423566660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884 (or 6882 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 423566660 is about 20580.7351666552. The cubic root of 423566660 is about 751.0011282469.

The spelling of 423566660 in words is "four hundred twenty-three million, five hundred sixty-six thousand, six hundred sixty".