6681377141 has 2 divisors, whose sum is σ = 6681377142. Its totient is φ = 6681377140.

The previous prime is 6681377137. The next prime is 6681377147. The reversal of 6681377141 is 1417731866.

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., 4285666225 + 2395710916 = 65465^2 + 48946^2 .

It is a cyclic number.

It is not a de Polignac number, because 6681377141 - 2² = 6681377137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6681377092 and 6681377101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681377147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340688570 + 3340688571.

It is an arithmetic number, because the mean of its divisors is an integer number (3340688571).

Almost surely, 2^6681377141 is an apocalyptic number.

It is an amenable number.

6681377141 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681377141 is an equidigital number, since it uses as much as digits as its factorization.

6681377141 is an evil number, because the sum of its binary digits is even.

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

The square root of 6681377141 is about 81739.6913439242. The cubic root of 6681377141 is about 1883.4553494515.

The spelling of 6681377141 in words is "six billion, six hundred eighty-one million, three hundred seventy-seven thousand, one hundred forty-one".