66692028799 has 8 divisors (see below), whose sum is σ = 75263731920. Its totient is φ = 58538457600.

The previous prime is 66692028797. The next prime is 66692028803. The reversal of 66692028799 is 99782029666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66692028799 - 2¹ = 66692028797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66692028799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66692028791) by changing a digit.

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, 104532642 + ... + 104533279.

It is an arithmetic number, because the mean of its divisors is an integer number (9407966490).

Almost surely, 2^66692028799 is an apocalyptic number.

66692028799 is a deficient number, since it is larger than the sum of its proper divisors (8571703121).

66692028799 is a wasteful number, since it uses less digits than its factorization.

66692028799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209065961.

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 66692028799 in words is "sixty-six billion, six hundred ninety-two million, twenty-eight thousand, seven hundred ninety-nine".