66085966 has 4 divisors (see below), whose sum is σ = 99128952. Its totient is φ = 33042982.

The previous prime is 66085939. The next prime is 66086039. The reversal of 66085966 is 66958066.

66085966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent 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 as a sum of consecutive naturals, namely, 16521490 + ... + 16521493.

It is an arithmetic number, because the mean of its divisors is an integer number (24782238).

Almost surely, 2^66085966 is an apocalyptic number.

66085966 is a deficient number, since it is larger than the sum of its proper divisors (33042986).

66085966 is a wasteful number, since it uses less digits than its factorization.

66085966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33042985.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 66085966 is about 8129.3275244635. The cubic root of 66085966 is about 404.2993851498.

The spelling of 66085966 in words is "sixty-six million, eighty-five thousand, nine hundred sixty-six".