66954086741 has 2 divisors, whose sum is σ = 66954086742. Its totient is φ = 66954086740.

The previous prime is 66954086737. The next prime is 66954086743. The reversal of 66954086741 is 14768045966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52948311025 + 14005775716 = 230105^2 + 118346^2 .

It is a cyclic number.

It is not a de Polignac number, because 66954086741 - 2² = 66954086737 is a prime.

Together with 66954086743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66954086743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33477043370 + 33477043371.

It is an arithmetic number, because the mean of its divisors is an integer number (33477043371).

Almost surely, 2^66954086741 is an apocalyptic number.

It is an amenable number.

66954086741 is a deficient number, since it is larger than the sum of its proper divisors (1).

66954086741 is an equidigital number, since it uses as much as digits as its factorization.

66954086741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 66954086741 in words is "sixty-six billion, nine hundred fifty-four million, eighty-six thousand, seven hundred forty-one".