666325320 has 32 divisors (see below), whose sum is σ = 1998976320. Its totient is φ = 177686720.

The previous prime is 666325277. The next prime is 666325321. The reversal of 666325320 is 23523666.

666325320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (666325321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2776236 + ... + 2776475.

It is an arithmetic number, because the mean of its divisors is an integer number (62468010).

Almost surely, 2^666325320 is an apocalyptic number.

666325320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666325320 is an abundant number, since it is smaller than the sum of its proper divisors (1332651000).

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

666325320 is a wasteful number, since it uses less digits than its factorization.

666325320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552725 (or 5552721 counting only the distinct ones).

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

The square root of 666325320 is about 25813.2779785908. The cubic root of 666325320 is about 873.4313423923.

Adding to 666325320 its reverse (23523666), we get a palindrome (689848986).

The spelling of 666325320 in words is "six hundred sixty-six million, three hundred twenty-five thousand, three hundred twenty".