66125775011 has 2 divisors, whose sum is σ = 66125775012. Its totient is φ = 66125775010.

The previous prime is 66125774987. The next prime is 66125775013. The reversal of 66125775011 is 11057752166.

66125775011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66125775011 - 2⁶ = 66125774947 is a prime.

Together with 66125775013, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66125775011.

It is not a weakly prime, because it can be changed into another prime (66125775013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33062887505 + 33062887506.

It is an arithmetic number, because the mean of its divisors is an integer number (33062887506).

Almost surely, 2^66125775011 is an apocalyptic number.

66125775011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66125775011 is an equidigital number, since it uses as much as digits as its factorization.

66125775011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 66125775011 in words is "sixty-six billion, one hundred twenty-five million, seven hundred seventy-five thousand, eleven".