8331126661 has 16 divisors (see below), whose sum is σ = 9794348928. Its totient is φ = 6986347200.

The previous prime is 8331126659. The next prime is 8331126691. The reversal of 8331126661 is 1666211338.

It is a cyclic number.

It is not a de Polignac number, because 8331126661 - 2¹ = 8331126659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8331126661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8331126691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196795 + ... + 235351.

It is an arithmetic number, because the mean of its divisors is an integer number (612146808).

Almost surely, 2^8331126661 is an apocalyptic number.

It is an amenable number.

8331126661 is a deficient number, since it is larger than the sum of its proper divisors (1463222267).

8331126661 is a wasteful number, since it uses less digits than its factorization.

8331126661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40092.

The product of its digits is 31104, while the sum is 37.

The square root of 8331126661 is about 91275.0056751573. The cubic root of 8331126661 is about 2027.2216970350.

Adding to 8331126661 its reverse (1666211338), we get a palindrome (9997337999).

The spelling of 8331126661 in words is "eight billion, three hundred thirty-one million, one hundred twenty-six thousand, six hundred sixty-one".