71067677771 has 2 divisors, whose sum is σ = 71067677772. Its totient is φ = 71067677770.

The previous prime is 71067677731. The next prime is 71067677773. The reversal of 71067677771 is 17777676017.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71067677771 - 2²² = 71063483467 is a prime.

It is a super-2 number, since 2×71067677771² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 71067677773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71067677773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35533838885 + 35533838886.

It is an arithmetic number, because the mean of its divisors is an integer number (35533838886).

Almost surely, 2^71067677771 is an apocalyptic number.

71067677771 is a deficient number, since it is larger than the sum of its proper divisors (1).

71067677771 is an equidigital number, since it uses as much as digits as its factorization.

71067677771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4235364, while the sum is 56.

The spelling of 71067677771 in words is "seventy-one billion, sixty-seven million, six hundred seventy-seven thousand, seven hundred seventy-one".