66541703741 has 2 divisors, whose sum is σ = 66541703742. Its totient is φ = 66541703740.

The previous prime is 66541703717. The next prime is 66541703759. The reversal of 66541703741 is 14730714566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62373064516 + 4168639225 = 249746^2 + 64565^2 .

It is a cyclic number.

It is not a de Polignac number, because 66541703741 - 2¹⁴ = 66541687357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66541703692 and 66541703701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66541703141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33270851870 + 33270851871.

It is an arithmetic number, because the mean of its divisors is an integer number (33270851871).

Almost surely, 2^66541703741 is an apocalyptic number.

It is an amenable number.

66541703741 is a deficient number, since it is larger than the sum of its proper divisors (1).

66541703741 is an equidigital number, since it uses as much as digits as its factorization.

66541703741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 66541703741 in words is "sixty-six billion, five hundred forty-one million, seven hundred three thousand, seven hundred forty-one".