66751028411 has 16 divisors (see below), whose sum is σ = 73665865728. Its totient is φ = 60207580800.

The previous prime is 66751028389. The next prime is 66751028459. The reversal of 66751028411 is 11482015766.

It is not a de Polignac number, because 66751028411 - 2⁶ = 66751028347 is a prime.

It is a super-2 number, since 2×66751028411² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66751028471) 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 15 ways as a sum of consecutive naturals, for example, 560585 + ... + 669146.

It is an arithmetic number, because the mean of its divisors is an integer number (4604116608).

Almost surely, 2^66751028411 is an apocalyptic number.

66751028411 is a deficient number, since it is larger than the sum of its proper divisors (6914837317).

66751028411 is a wasteful number, since it uses less digits than its factorization.

66751028411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229882.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 66751028411 in words is "sixty-six billion, seven hundred fifty-one million, twenty-eight thousand, four hundred eleven".