668078275 has 6 divisors (see below), whose sum is σ = 828417092. Its totient is φ = 534462600.

The previous prime is 668078267. The next prime is 668078311. The reversal of 668078275 is 572870866.

It is not a de Polignac number, because 668078275 - 2³ = 668078267 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 13361541 + ... + 13361590.

Almost surely, 2^668078275 is an apocalyptic number.

668078275 is a deficient number, since it is larger than the sum of its proper divisors (160338817).

668078275 is a wasteful number, since it uses less digits than its factorization.

668078275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26723141 (or 26723136 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The square root of 668078275 is about 25847.2101976209. The cubic root of 668078275 is about 874.1966067970.

The spelling of 668078275 in words is "six hundred sixty-eight million, seventy-eight thousand, two hundred seventy-five".