66942828750 has 80 divisors (see below), whose sum is σ = 191204095104. Its totient is φ = 15301212000.

The previous prime is 66942828739. The next prime is 66942828751. The reversal of 66942828750 is 5782824966.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66942828751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1248852 + ... + 1301351.

Almost surely, 2^66942828750 is an apocalyptic number.

66942828750 is an abundant number, since it is smaller than the sum of its proper divisors (124261266354).

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

66942828750 is a wasteful number, since it uses less digits than its factorization.

66942828750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550235 (or 2550220 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 66942828750 in words is "sixty-six billion, nine hundred forty-two million, eight hundred twenty-eight thousand, seven hundred fifty".