71466675257 has 2 divisors, whose sum is σ = 71466675258. Its totient is φ = 71466675256.

The previous prime is 71466675191. The next prime is 71466675283. The reversal of 71466675257 is 75257666417.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70647513616 + 819161641 = 265796^2 + 28621^2 .

It is a cyclic number.

It is not a de Polignac number, because 71466675257 - 2²⁴ = 71449898041 is a prime.

It is not a weakly prime, because it can be changed into another prime (71466675757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35733337628 + 35733337629.

It is an arithmetic number, because the mean of its divisors is an integer number (35733337629).

Almost surely, 2^71466675257 is an apocalyptic number.

It is an amenable number.

71466675257 is a deficient number, since it is larger than the sum of its proper divisors (1).

71466675257 is an equidigital number, since it uses as much as digits as its factorization.

71466675257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14817600, while the sum is 56.

The spelling of 71466675257 in words is "seventy-one billion, four hundred sixty-six million, six hundred seventy-five thousand, two hundred fifty-seven".