7666848181 has 4 divisors (see below), whose sum is σ = 7874060332. Its totient is φ = 7459636032.

The previous prime is 7666848151. The next prime is 7666848191. The reversal of 7666848181 is 1818486667.

It is a happy number.

7666848181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1818486667 = 317 ⋅5736551.

It can be written as a sum of positive squares in 2 ways, for example, as 3701627281 + 3965220900 = 60841^2 + 62970^2 .

It is a cyclic number.

It is not a de Polignac number, because 7666848181 - 2⁵ = 7666848149 is a prime.

It is a super-2 number, since 2×7666848181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666848131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103606020 + ... + 103606093.

It is an arithmetic number, because the mean of its divisors is an integer number (1968515083).

Almost surely, 2^7666848181 is an apocalyptic number.

It is an amenable number.

7666848181 is a deficient number, since it is larger than the sum of its proper divisors (207212151).

7666848181 is a wasteful number, since it uses less digits than its factorization.

7666848181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207212150.

The product of its digits is 3096576, while the sum is 55.

The square root of 7666848181 is about 87560.5400908423. The cubic root of 7666848181 is about 1971.8427946284.

The spelling of 7666848181 in words is "seven billion, six hundred sixty-six million, eight hundred forty-eight thousand, one hundred eighty-one".