66667945588 has 12 divisors (see below), whose sum is σ = 118410232192. Its totient is φ = 32836450680.

The previous prime is 66667945543. The next prime is 66667945607. The reversal of 66667945588 is 88554976666.

It is a super-2 number, since 2×66667945588² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 124380228 + ... + 124380763.

Almost surely, 2^66667945588 is an apocalyptic number.

It is an amenable number.

66667945588 is a deficient number, since it is larger than the sum of its proper divisors (51742286604).

66667945588 is a wasteful number, since it uses less digits than its factorization.

66667945588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248761062 (or 248761060 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 70.

The spelling of 66667945588 in words is "sixty-six billion, six hundred sixty-seven million, nine hundred forty-five thousand, five hundred eighty-eight".