660068406 has 32 divisors (see below), whose sum is σ = 1468362720. Its totient is φ = 219791232.

The previous prime is 660068359. The next prime is 660068429. The reversal of 660068406 is 604860066.

660068406 is a `hidden beast` number, since 6 + 600 + 6 + 8 + 40 + 6 = 666.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 49866 + ... + 61698.

It is an arithmetic number, because the mean of its divisors is an integer number (45886335).

Almost surely, 2^660068406 is an apocalyptic number.

660068406 is an abundant number, since it is smaller than the sum of its proper divisors (808294314).

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

660068406 is a wasteful number, since it uses less digits than its factorization.

660068406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12877 (or 12871 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 660068406 is about 25691.7964728043. The cubic root of 660068406 is about 870.6888480195.

The spelling of 660068406 in words is "six hundred sixty million, sixty-eight thousand, four hundred six".