66688671364 has 12 divisors (see below), whose sum is σ = 133377342784. Its totient is φ = 28580859144.

The previous prime is 66688671359. The next prime is 66688671403. The reversal of 66688671364 is 46317688666.

It is a happy number.

66688671364 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 1190869104 + ... + 1190869159.

Almost surely, 2^66688671364 is an apocalyptic number.

It is an amenable number.

66688671364 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66688671364 is a wasteful number, since it uses less digits than its factorization.

66688671364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381738274 (or 2381738272 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 61.

The spelling of 66688671364 in words is "sixty-six billion, six hundred eighty-eight million, six hundred seventy-one thousand, three hundred sixty-four".