66541273471 has 2 divisors, whose sum is σ = 66541273472. Its totient is φ = 66541273470.

The previous prime is 66541273441. The next prime is 66541273609. The reversal of 66541273471 is 17437214566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66541273471 - 2⁵ = 66541273439 is a prime.

It is a super-3 number, since 3×66541273471³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66541273411) 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 as a sum of consecutive naturals, namely, 33270636735 + 33270636736.

It is an arithmetic number, because the mean of its divisors is an integer number (33270636736).

Almost surely, 2^66541273471 is an apocalyptic number.

66541273471 is a deficient number, since it is larger than the sum of its proper divisors (1).

66541273471 is an equidigital number, since it uses as much as digits as its factorization.

66541273471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The spelling of 66541273471 in words is "sixty-six billion, five hundred forty-one million, two hundred seventy-three thousand, four hundred seventy-one".