6166666613 has 2 divisors, whose sum is σ = 6166666614. Its totient is φ = 6166666612.

The previous prime is 6166666603. The next prime is 6166666637. The reversal of 6166666613 is 3166666616.

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., 4015376689 + 2151289924 = 63367^2 + 46382^2 .

It is a cyclic number.

It is not a de Polignac number, because 6166666613 - 2⁸ = 6166666357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6166666603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3083333306 + 3083333307.

It is an arithmetic number, because the mean of its divisors is an integer number (3083333307).

Almost surely, 2^6166666613 is an apocalyptic number.

It is an amenable number.

6166666613 is a deficient number, since it is larger than the sum of its proper divisors (1).

6166666613 is an equidigital number, since it uses as much as digits as its factorization.

6166666613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The square root of 6166666613 is about 78528.1262542282. The cubic root of 6166666613 is about 1833.7923498990.

The spelling of 6166666613 in words is "six billion, one hundred sixty-six million, six hundred sixty-six thousand, six hundred thirteen".