668028315 has 32 divisors (see below), whose sum is σ = 1135111680. Its totient is φ = 334526976.

The previous prime is 668028313. The next prime is 668028323. The reversal of 668028315 is 513820866.

It is a happy number.

It is not a de Polignac number, because 668028315 - 2¹ = 668028313 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (668028313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21834 + ... + 42576.

It is an arithmetic number, because the mean of its divisors is an integer number (35472240).

Almost surely, 2^668028315 is an apocalyptic number.

668028315 is a deficient number, since it is larger than the sum of its proper divisors (467083365).

668028315 is a wasteful number, since it uses less digits than its factorization.

668028315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20883.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 668028315 is about 25846.2437309563. The cubic root of 668028315 is about 874.1748149637.

The spelling of 668028315 in words is "six hundred sixty-eight million, twenty-eight thousand, three hundred fifteen".