71660476631477 has 2 divisors, whose sum is σ = 71660476631478. Its totient is φ = 71660476631476.

The previous prime is 71660476631467. The next prime is 71660476631479. The reversal of 71660476631477 is 77413667406617.

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., 60725378437201 + 10935098194276 = 7792649^2 + 3306826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71660476631477 is a prime.

It is a super-2 number, since 2×71660476631477² (a number of 29 digits) contains 22 as substring.

Together with 71660476631479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71660476631479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35830238315738 + 35830238315739.

It is an arithmetic number, because the mean of its divisors is an integer number (35830238315739).

Almost surely, 2^{71660476631477} is an apocalyptic number.

It is an amenable number.

71660476631477 is a deficient number, since it is larger than the sum of its proper divisors (1).

71660476631477 is an equidigital number, since it uses as much as digits as its factorization.

71660476631477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 149361408, while the sum is 65.

The spelling of 71660476631477 in words is "seventy-one trillion, six hundred sixty billion, four hundred seventy-six million, six hundred thirty-one thousand, four hundred seventy-seven".