66668834 has 16 divisors (see below), whose sum is σ = 107717280. Its totient is φ = 30844800.

The previous prime is 66668827. The next prime is 66668843. The reversal of 66668834 is 43886666.

66668834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 18767 + ... + 22034.

It is an arithmetic number, because the mean of its divisors is an integer number (6732330).

Almost surely, 2^66668834 is an apocalyptic number.

66668834 is a deficient number, since it is larger than the sum of its proper divisors (41048446).

66668834 is a wasteful number, since it uses less digits than its factorization.

66668834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865.

The product of its digits is 995328, while the sum is 47.

The square root of 66668834 is about 8165.0985297178. The cubic root of 66668834 is about 405.4845270437.

The spelling of 66668834 in words is "sixty-six million, six hundred sixty-eight thousand, eight hundred thirty-four".