66871141 has 2 divisors, whose sum is σ = 66871142. Its totient is φ = 66871140.

The previous prime is 66871117. The next prime is 66871151. The reversal of 66871141 is 14117866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52620516 + 14250625 = 7254^2 + 3775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66871141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66871097 and 66871106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66871111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33435570 + 33435571.

It is an arithmetic number, because the mean of its divisors is an integer number (33435571).

Almost surely, 2^66871141 is an apocalyptic number.

It is an amenable number.

66871141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66871141 is an equidigital number, since it uses as much as digits as its factorization.

66871141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 66871141 is about 8177.4776673495. The cubic root of 66871141 is about 405.8942613327.

The spelling of 66871141 in words is "sixty-six million, eight hundred seventy-one thousand, one hundred forty-one".