66987684134 has 16 divisors (see below), whose sum is σ = 120880032000. Its totient is φ = 27198006984.

The previous prime is 66987684121. The next prime is 66987684149. The reversal of 66987684134 is 43148678966.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 125916434 + ... + 125916965.

It is an arithmetic number, because the mean of its divisors is an integer number (7555002000).

Almost surely, 2^66987684134 is an apocalyptic number.

66987684134 is a deficient number, since it is larger than the sum of its proper divisors (53892347866).

66987684134 is a wasteful number, since it uses less digits than its factorization.

66987684134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251833427.

The product of its digits is 41803776, while the sum is 62.

The spelling of 66987684134 in words is "sixty-six billion, nine hundred eighty-seven million, six hundred eighty-four thousand, one hundred thirty-four".