66700884828 has 24 divisors (see below), whose sum is σ = 155641346560. Its totient is φ = 22232778480.

The previous prime is 66700884799. The next prime is 66700884863. The reversal of 66700884828 is 82848800766.

It is a happy number.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275763 + ... + 457653.

Almost surely, 2^66700884828 is an apocalyptic number.

It is an amenable number.

66700884828 is an abundant number, since it is smaller than the sum of its proper divisors (88940461732).

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

66700884828 is a wasteful number, since it uses less digits than its factorization.

66700884828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212457 (or 212455 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 57.

The spelling of 66700884828 in words is "sixty-six billion, seven hundred million, eight hundred eighty-four thousand, eight hundred twenty-eight".