67711043861 has 2 divisors, whose sum is σ = 67711043862. Its totient is φ = 67711043860.

The previous prime is 67711043839. The next prime is 67711043879. The reversal of 67711043861 is 16834011776.

It is a happy number.

67711043861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61655869636 + 6055174225 = 248306^2 + 77815^2 .

It is a cyclic number.

It is not a de Polignac number, because 67711043861 - 2²² = 67706849557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67711043891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33855521930 + 33855521931.

It is an arithmetic number, because the mean of its divisors is an integer number (33855521931).

Almost surely, 2^67711043861 is an apocalyptic number.

It is an amenable number.

67711043861 is a deficient number, since it is larger than the sum of its proper divisors (1).

67711043861 is an equidigital number, since it uses as much as digits as its factorization.

67711043861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 67711043861 in words is "sixty-seven billion, seven hundred eleven million, forty-three thousand, eight hundred sixty-one".