665256330 has 48 divisors (see below), whose sum is σ = 1766479104. Its totient is φ = 173626080.

The previous prime is 665256323. The next prime is 665256331. The reversal of 665256330 is 33652566.

665256330 is a `hidden beast` number, since 6 + 65 + 2 + 563 + 30 = 666.

It is not an unprimeable number, because it can be changed into a prime (665256331) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 74406 + ... + 82865.

It is an arithmetic number, because the mean of its divisors is an integer number (36801648).

Almost surely, 2^665256330 is an apocalyptic number.

665256330 is an abundant number, since it is smaller than the sum of its proper divisors (1101222774).

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

665256330 is a wasteful number, since it uses less digits than its factorization.

665256330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157331 (or 157328 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The square root of 665256330 is about 25792.5634631380. The cubic root of 665256330 is about 872.9640085460.

The spelling of 665256330 in words is "six hundred sixty-five million, two hundred fifty-six thousand, three hundred thirty".