66040802188 has 24 divisors (see below), whose sum is σ = 116135353152. Its totient is φ = 32859411024.

The previous prime is 66040802147. The next prime is 66040802227. The reversal of 66040802188 is 88120804066.

66040802188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66040802188² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2042395 + ... + 2074477.

It is an arithmetic number, because the mean of its divisors is an integer number (4838973048).

Almost surely, 2^66040802188 is an apocalyptic number.

It is an amenable number.

66040802188 is a deficient number, since it is larger than the sum of its proper divisors (50094550964).

66040802188 is a wasteful number, since it uses less digits than its factorization.

66040802188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34581 (or 34579 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 66040802188 in words is "sixty-six billion, forty million, eight hundred two thousand, one hundred eighty-eight".