66911675321 has 32 divisors (see below), whose sum is σ = 71518809600. Its totient is φ = 62487936000.

The previous prime is 66911675297. The next prime is 66911675333. The reversal of 66911675321 is 12357611966.

It is a de Polignac number, because none of the positive numbers 2^k-66911675321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66911675381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90543170 + ... + 90543908.

It is an arithmetic number, because the mean of its divisors is an integer number (2234962800).

Almost surely, 2^66911675321 is an apocalyptic number.

It is an amenable number.

66911675321 is a deficient number, since it is larger than the sum of its proper divisors (4607134279).

66911675321 is a wasteful number, since it uses less digits than its factorization.

66911675321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its digits is 408240, while the sum is 47.

The spelling of 66911675321 in words is "sixty-six billion, nine hundred eleven million, six hundred seventy-five thousand, three hundred twenty-one".