666646046 has 32 divisors (see below), whose sum is σ = 1153267200. Its totient is φ = 285828480.

The previous prime is 666646033. The next prime is 666646069. The reversal of 666646046 is 640646666.

It is a junction number, because it is equal to n+sod(n) for n = 666645988 and 666646006.

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, 96566 + ... + 103238.

It is an arithmetic number, because the mean of its divisors is an integer number (36039600).

Almost surely, 2^666646046 is an apocalyptic number.

666646046 is a deficient number, since it is larger than the sum of its proper divisors (486621154).

666646046 is a wasteful number, since it uses less digits than its factorization.

666646046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 666646046 is about 25819.4896541353. The cubic root of 666646046 is about 873.5714577376.

The spelling of 666646046 in words is "six hundred sixty-six million, six hundred forty-six thousand, forty-six".