66471473 has 2 divisors, whose sum is σ = 66471474. Its totient is φ = 66471472.

The previous prime is 66471467. The next prime is 66471523. The reversal of 66471473 is 37417466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 64 = 8153^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 66471473 - 2⁸ = 66471217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66471073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33235736 + 33235737.

It is an arithmetic number, because the mean of its divisors is an integer number (33235737).

Almost surely, 2^66471473 is an apocalyptic number.

It is an amenable number.

66471473 is a deficient number, since it is larger than the sum of its proper divisors (1).

66471473 is an equidigital number, since it uses as much as digits as its factorization.

66471473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 66471473 is about 8153.0039249347. The cubic root of 66471473 is about 405.0840104135.

The spelling of 66471473 in words is "sixty-six million, four hundred seventy-one thousand, four hundred seventy-three".