6681067399 has 2 divisors, whose sum is σ = 6681067400. Its totient is φ = 6681067398.

The previous prime is 6681067391. The next prime is 6681067403. The reversal of 6681067399 is 9937601866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6681067399 - 2³ = 6681067391 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681067391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340533699 + 3340533700.

It is an arithmetic number, because the mean of its divisors is an integer number (3340533700).

Almost surely, 2^6681067399 is an apocalyptic number.

6681067399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681067399 is an equidigital number, since it uses as much as digits as its factorization.

6681067399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The square root of 6681067399 is about 81737.7966365622. The cubic root of 6681067399 is about 1883.4262439628.

The spelling of 6681067399 in words is "six billion, six hundred eighty-one million, sixty-seven thousand, three hundred ninety-nine".