66211925243 has 2 divisors, whose sum is σ = 66211925244. Its totient is φ = 66211925242.

The previous prime is 66211925203. The next prime is 66211925251. The reversal of 66211925243 is 34252911266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66211925243 - 2⁶ = 66211925179 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66211925243.

It is not a weakly prime, because it can be changed into another prime (66211925203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33105962621 + 33105962622.

It is an arithmetic number, because the mean of its divisors is an integer number (33105962622).

Almost surely, 2^66211925243 is an apocalyptic number.

66211925243 is a deficient number, since it is larger than the sum of its proper divisors (1).

66211925243 is an equidigital number, since it uses as much as digits as its factorization.

66211925243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The spelling of 66211925243 in words is "sixty-six billion, two hundred eleven million, nine hundred twenty-five thousand, two hundred forty-three".