666305232 has 60 divisors (see below), whose sum is σ = 1735692480. Its totient is φ = 220254720.

The previous prime is 666305221. The next prime is 666305267. The reversal of 666305232 is 232503666.

It is a junction number, because it is equal to n+sod(n) for n = 666305193 and 666305202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2764632 + ... + 2764872.

It is an arithmetic number, because the mean of its divisors is an integer number (28928208).

Almost surely, 2^666305232 is an apocalyptic number.

It is an amenable number.

666305232 is an abundant number, since it is smaller than the sum of its proper divisors (1069387248).

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

666305232 is a wasteful number, since it uses less digits than its factorization.

666305232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 666305232 is about 25812.8888735841. Note that the first 4 decimals coincide. The cubic root of 666305232 is about 873.4225650656.

Adding to 666305232 its reverse (232503666), we get a palindrome (898808898).

The spelling of 666305232 in words is "six hundred sixty-six million, three hundred five thousand, two hundred thirty-two".