668303265 has 32 divisors (see below), whose sum is σ = 1237524480. Its totient is φ = 301639104.

The previous prime is 668303263. The next prime is 668303299. The reversal of 668303265 is 562303866.

It is a happy number.

It is not a de Polignac number, because 668303265 - 2¹ = 668303263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668303261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31989 + ... + 48578.

It is an arithmetic number, because the mean of its divisors is an integer number (38672640).

Almost surely, 2^668303265 is an apocalyptic number.

It is an amenable number.

668303265 is a deficient number, since it is larger than the sum of its proper divisors (569221215).

668303265 is a wasteful number, since it uses less digits than its factorization.

668303265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80661.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 668303265 is about 25851.5621384859. The cubic root of 668303265 is about 874.2947307378.

The spelling of 668303265 in words is "six hundred sixty-eight million, three hundred three thousand, two hundred sixty-five".