666608026 has 16 divisors (see below), whose sum is σ = 1156526784. Its totient is φ = 282246624.

The previous prime is 666608017. The next prime is 666608039. The reversal of 666608026 is 620806666.

It is a self number, because there is not a number n which added to its sum of digits gives 666608026.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 285675 + ... + 287998.

It is an arithmetic number, because the mean of its divisors is an integer number (72282924).

Almost surely, 2^666608026 is an apocalyptic number.

666608026 is a deficient number, since it is larger than the sum of its proper divisors (489918758).

666608026 is a wasteful number, since it uses less digits than its factorization.

666608026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573765.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 666608026 is about 25818.7533781165. The cubic root of 666608026 is about 873.5548503148.

The spelling of 666608026 in words is "six hundred sixty-six million, six hundred eight thousand, twenty-six".