66672716794 has 8 divisors (see below), whose sum is σ = 100796548608. Its totient is φ = 33073867260.

The previous prime is 66672716791. The next prime is 66672716813. The reversal of 66672716794 is 49761727666.

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

It is not an unprimeable number, because it can be changed into a prime (66672716791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131245252 + ... + 131245759.

It is an arithmetic number, because the mean of its divisors is an integer number (12599568576).

Almost surely, 2^66672716794 is an apocalyptic number.

66672716794 is a deficient number, since it is larger than the sum of its proper divisors (34123831814).

66672716794 is a wasteful number, since it uses less digits than its factorization.

66672716794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262491140.

The product of its digits is 32006016, while the sum is 61.

The spelling of 66672716794 in words is "sixty-six billion, six hundred seventy-two million, seven hundred sixteen thousand, seven hundred ninety-four".