66866066866 has 32 divisors (see below), whose sum is σ = 103020408000. Its totient is φ = 32539320000.

The previous prime is 66866066849. The next prime is 66866066893.

66866066866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66866066798 and 66866066807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6748516 + ... + 6758416.

It is an arithmetic number, because the mean of its divisors is an integer number (3219387750).

Almost surely, 2^66866066866 is an apocalyptic number.

66866066866 is a deficient number, since it is larger than the sum of its proper divisors (36154341134).

66866066866 is a wasteful number, since it uses less digits than its factorization.

66866066866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10570.

The product of its (nonzero) digits is 107495424, while the sum is 64.

The spelling of 66866066866 in words is "sixty-six billion, eight hundred sixty-six million, sixty-six thousand, eight hundred sixty-six".