66788006788 has 12 divisors (see below), whose sum is σ = 123030538960. Its totient is φ = 31636424232.

The previous prime is 66788006783. The next prime is 66788006801. The reversal of 66788006788 is 88760088766.

It is a super-3 number, since 3×66788006788³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66788006783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439394706 + ... + 439394857.

Almost surely, 2^66788006788 is an apocalyptic number.

It is an amenable number.

66788006788 is a deficient number, since it is larger than the sum of its proper divisors (56242532172).

66788006788 is a wasteful number, since it uses less digits than its factorization.

66788006788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878789586 (or 878789584 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 66788006788 in words is "sixty-six billion, seven hundred eighty-eight million, six thousand, seven hundred eighty-eight".