71658667897 has 2 divisors, whose sum is σ = 71658667898. Its totient is φ = 71658667896.

The previous prime is 71658667879. The next prime is 71658668021. The reversal of 71658667897 is 79876685617.

It is a happy number.

Together with previous prime (71658667879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69873520896 + 1785147001 = 264336^2 + 42251^2 .

It is a cyclic number.

It is not a de Polignac number, because 71658667897 - 2¹¹ = 71658665849 is a prime.

It is not a weakly prime, because it can be changed into another prime (71658667807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35829333948 + 35829333949.

It is an arithmetic number, because the mean of its divisors is an integer number (35829333949).

Almost surely, 2^71658667897 is an apocalyptic number.

It is an amenable number.

71658667897 is a deficient number, since it is larger than the sum of its proper divisors (1).

71658667897 is an equidigital number, since it uses as much as digits as its factorization.

71658667897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 213373440, while the sum is 70.

The spelling of 71658667897 in words is "seventy-one billion, six hundred fifty-eight million, six hundred sixty-seven thousand, eight hundred ninety-seven".