3666816816812 has 6 divisors (see below), whose sum is σ = 6416929429428. Its totient is φ = 1833408408404.

The previous prime is 3666816816811. The next prime is 3666816816851. The reversal of 3666816816812 is 2186186186663.

It is not an unprimeable number, because it can be changed into a prime (3666816816811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458352102098 + ... + 458352102105.

It is an arithmetic number, because the mean of its divisors is an integer number (1069488238238).

Almost surely, 2^{3666816816812} is an apocalyptic number.

It is an amenable number.

3666816816812 is a deficient number, since it is larger than the sum of its proper divisors (2750112612616).

3666816816812 is a wasteful number, since it uses less digits than its factorization.

3666816816812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916704204207 (or 916704204205 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 62.

The spelling of 3666816816812 in words is "three trillion, six hundred sixty-six billion, eight hundred sixteen million, eight hundred sixteen thousand, eight hundred twelve".