66008666 has 16 divisors (see below), whose sum is σ = 106113024. Its totient is φ = 30715344.

The previous prime is 66008627. The next prime is 66008731. The reversal of 66008666 is 66680066.

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, 17690 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (6632064).

Almost surely, 2^66008666 is an apocalyptic number.

66008666 is a deficient number, since it is larger than the sum of its proper divisors (40104358).

66008666 is a wasteful number, since it uses less digits than its factorization.

66008666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38845.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 66008666 is about 8124.5717425597. The cubic root of 66008666 is about 404.1416888568.

The spelling of 66008666 in words is "sixty-six million, eight thousand, six hundred sixty-six".