8479126661 has 2 divisors, whose sum is σ = 8479126662. Its totient is φ = 8479126660.

The previous prime is 8479126651. The next prime is 8479126693. The reversal of 8479126661 is 1666219748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5464018561 + 3015108100 = 73919^2 + 54910^2 .

It is a cyclic number.

It is not a de Polignac number, because 8479126661 - 2²⁶ = 8412017797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8479126651) 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 as a sum of consecutive naturals, namely, 4239563330 + 4239563331.

It is an arithmetic number, because the mean of its divisors is an integer number (4239563331).

Almost surely, 2^8479126661 is an apocalyptic number.

It is an amenable number.

8479126661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8479126661 is an equidigital number, since it uses as much as digits as its factorization.

8479126661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 8479126661 is about 92082.1734159224. The cubic root of 8479126661 is about 2039.1556371232.

The spelling of 8479126661 in words is "eight billion, four hundred seventy-nine million, one hundred twenty-six thousand, six hundred sixty-one".