66811277211866 has 16 divisors (see below), whose sum is σ = 109345429182528. Its totient is φ = 30363794409600.

The previous prime is 66811277211851. The next prime is 66811277211883.

66811277211866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66811277211799 and 66811277211808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248260430 + ... + 248529401.

It is an arithmetic number, because the mean of its divisors is an integer number (6834089323908).

Almost surely, 2^{66811277211866} is an apocalyptic number.

66811277211866 is a deficient number, since it is larger than the sum of its proper divisors (42534151970662).

66811277211866 is a wasteful number, since it uses less digits than its factorization.

66811277211866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496795957.

The product of its digits is 16257024, while the sum is 62.

The spelling of 66811277211866 in words is "sixty-six trillion, eight hundred eleven billion, two hundred seventy-seven million, two hundred eleven thousand, eight hundred sixty-six".