66651066676 has 24 divisors (see below), whose sum is σ = 120719340000. Its totient is φ = 32160930144.

The previous prime is 66651066641. The next prime is 66651066707. The reversal of 66651066676 is 67666015666.

It is a congruent number.

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, 106615 + ... + 380353.

It is an arithmetic number, because the mean of its divisors is an integer number (5029972500).

Almost surely, 2^66651066676 is an apocalyptic number.

It is an amenable number.

66651066676 is a deficient number, since it is larger than the sum of its proper divisors (54068273324).

66651066676 is a wasteful number, since it uses less digits than its factorization.

66651066676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275871 (or 275869 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 66651066676 in words is "sixty-six billion, six hundred fifty-one million, sixty-six thousand, six hundred seventy-six".