66684067796 has 24 divisors (see below), whose sum is σ = 118734483840. Its totient is φ = 32763931200.

The previous prime is 66684067789. The next prime is 66684067799. The reversal of 66684067796 is 69776048666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66684067799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433385 + ... + 566736.

It is an arithmetic number, because the mean of its divisors is an integer number (4947270160).

Almost surely, 2^66684067796 is an apocalyptic number.

It is an amenable number.

66684067796 is a deficient number, since it is larger than the sum of its proper divisors (52050416044).

66684067796 is a wasteful number, since it uses less digits than its factorization.

66684067796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000415 (or 1000413 counting only the distinct ones).

The product of its (nonzero) digits is 109734912, while the sum is 65.

The spelling of 66684067796 in words is "sixty-six billion, six hundred eighty-four million, sixty-seven thousand, seven hundred ninety-six".