320654660 has 24 divisors (see below), whose sum is σ = 674689176. Its totient is φ = 128011520.

The previous prime is 320654657. The next prime is 320654681. The reversal of 320654660 is 66456023.

It can be written as a sum of positive squares in 4 ways, for example, as 173056 + 320481604 = 416^2 + 17902^2 .

It is an unprimeable number.

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, 4967 + ... + 25806.

It is an arithmetic number, because the mean of its divisors is an integer number (28112049).

Almost surely, 2^320654660 is an apocalyptic number.

It is an amenable number.

320654660 is an abundant number, since it is smaller than the sum of its proper divisors (354034516).

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

320654660 is a wasteful number, since it uses less digits than its factorization.

320654660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31303 (or 31301 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 320654660 is about 17906.8327741117. The cubic root of 320654660 is about 684.4564996385.

The spelling of 320654660 in words is "three hundred twenty million, six hundred fifty-four thousand, six hundred sixty".