6551666113 has 2 divisors, whose sum is σ = 6551666114. Its totient is φ = 6551666112.

The previous prime is 6551666111. The next prime is 6551666119. The reversal of 6551666113 is 3116661556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4858508209 + 1693157904 = 69703^2 + 41148^2 .

It is a cyclic number.

It is not a de Polignac number, because 6551666113 - 2¹ = 6551666111 is a prime.

Together with 6551666111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6551666111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275833056 + 3275833057.

It is an arithmetic number, because the mean of its divisors is an integer number (3275833057).

Almost surely, 2^6551666113 is an apocalyptic number.

It is an amenable number.

6551666113 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551666113 is an equidigital number, since it uses as much as digits as its factorization.

6551666113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 40.

The square root of 6551666113 is about 80942.3629071946. The cubic root of 6551666113 is about 1871.1872614342.

The spelling of 6551666113 in words is "six billion, five hundred fifty-one million, six hundred sixty-six thousand, one hundred thirteen".