6678100109 has 2 divisors, whose sum is σ = 6678100110. Its totient is φ = 6678100108.

The previous prime is 6678100087. The next prime is 6678100151. The reversal of 6678100109 is 9010018766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4867852900 + 1810247209 = 69770^2 + 42547^2 .

It is a cyclic number.

It is not a de Polignac number, because 6678100109 - 2¹² = 6678096013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6678100159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339050054 + 3339050055.

It is an arithmetic number, because the mean of its divisors is an integer number (3339050055).

Almost surely, 2^6678100109 is an apocalyptic number.

It is an amenable number.

6678100109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6678100109 is an equidigital number, since it uses as much as digits as its factorization.

6678100109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 6678100109 is about 81719.6433484630. The cubic root of 6678100109 is about 1883.1473713863.

The spelling of 6678100109 in words is "six billion, six hundred seventy-eight million, one hundred thousand, one hundred nine".