66605708 has 24 divisors (see below), whose sum is σ = 125752032. Its totient is φ = 30685824.

The previous prime is 66605657. The next prime is 66605713. The reversal of 66605708 is 80750666.

66605708 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 48041 + ... + 49407.

It is an arithmetic number, because the mean of its divisors is an integer number (5239668).

Almost surely, 2^66605708 is an apocalyptic number.

It is an amenable number.

66605708 is a deficient number, since it is larger than the sum of its proper divisors (59146324).

66605708 is a wasteful number, since it uses less digits than its factorization.

66605708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321 (or 2319 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 66605708 is about 8161.2320148370. The cubic root of 66605708 is about 405.3565077090.

The spelling of 66605708 in words is "sixty-six million, six hundred five thousand, seven hundred eight".