66471371 has 2 divisors, whose sum is σ = 66471372. Its totient is φ = 66471370.

The previous prime is 66471337. The next prime is 66471389. The reversal of 66471371 is 17317466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66471371 - 2¹⁰ = 66470347 is a prime.

It is not a weakly prime, because it can be changed into another prime (66471331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33235685 + 33235686.

It is an arithmetic number, because the mean of its divisors is an integer number (33235686).

Almost surely, 2^66471371 is an apocalyptic number.

66471371 is a deficient number, since it is larger than the sum of its proper divisors (1).

66471371 is an equidigital number, since it uses as much as digits as its factorization.

66471371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 66471371 is about 8152.9976695692. The cubic root of 66471371 is about 405.0838032139.

The spelling of 66471371 in words is "sixty-six million, four hundred seventy-one thousand, three hundred seventy-one".