66326666 has 8 divisors (see below), whose sum is σ = 113702880. Its totient is φ = 28425708.

The previous prime is 66326647. The next prime is 66326713. The reversal of 66326666 is 66662366.

It is a sphenic number, since it is the product of 3 distinct primes.

66326666 is a modest number, since divided by 6666 gives 6632 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368796 + ... + 2368823.

It is an arithmetic number, because the mean of its divisors is an integer number (14212860).

Almost surely, 2^66326666 is an apocalyptic number.

66326666 is a deficient number, since it is larger than the sum of its proper divisors (47376214).

66326666 is a wasteful number, since it uses less digits than its factorization.

66326666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4737628.

The product of its digits is 279936, while the sum is 41.

The square root of 66326666 is about 8144.1184912795. The cubic root of 66326666 is about 404.7896402867.

The spelling of 66326666 in words is "sixty-six million, three hundred twenty-six thousand, six hundred sixty-six".