71881700677 has 2 divisors, whose sum is σ = 71881700678. Its totient is φ = 71881700676.

The previous prime is 71881700669. The next prime is 71881700701. The reversal of 71881700677 is 77600718817.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71553040036 + 328660641 = 267494^2 + 18129^2 .

It is an emirp because it is prime and its reverse (77600718817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71881700677 - 2³ = 71881700669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71881700617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35940850338 + 35940850339.

It is an arithmetic number, because the mean of its divisors is an integer number (35940850339).

Almost surely, 2^71881700677 is an apocalyptic number.

It is an amenable number.

71881700677 is a deficient number, since it is larger than the sum of its proper divisors (1).

71881700677 is an equidigital number, since it uses as much as digits as its factorization.

71881700677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921984, while the sum is 52.

The spelling of 71881700677 in words is "seventy-one billion, eight hundred eighty-one million, seven hundred thousand, six hundred seventy-seven".