66903321729 has 8 divisors (see below), whose sum is σ = 91278950752. Its totient is φ = 43564953600.

The previous prime is 66903321703. The next prime is 66903321733. The reversal of 66903321729 is 92712330966.

It is a happy number.

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

It is not a de Polignac number, because 66903321729 - 2²⁸ = 66634886273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66903321769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259315072 + ... + 259315329.

It is an arithmetic number, because the mean of its divisors is an integer number (11409868844).

Almost surely, 2^66903321729 is an apocalyptic number.

It is an amenable number.

66903321729 is a deficient number, since it is larger than the sum of its proper divisors (24375629023).

66903321729 is a wasteful number, since it uses less digits than its factorization.

66903321729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518630447.

The product of its (nonzero) digits is 734832, while the sum is 48.

The spelling of 66903321729 in words is "sixty-six billion, nine hundred three million, three hundred twenty-one thousand, seven hundred twenty-nine".