6661173499 has 2 divisors, whose sum is σ = 6661173500. Its totient is φ = 6661173498.

The previous prime is 6661173481. The next prime is 6661173503. The reversal of 6661173499 is 9943711666.

6661173499 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6661173499 - 2¹³ = 6661165307 is a prime.

It is not a weakly prime, because it can be changed into another prime (6661173419) 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, 3330586749 + 3330586750.

It is an arithmetic number, because the mean of its divisors is an integer number (3330586750).

Almost surely, 2^6661173499 is an apocalyptic number.

6661173499 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661173499 is an equidigital number, since it uses as much as digits as its factorization.

6661173499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 6661173499 is about 81616.0125159273. The cubic root of 6661173499 is about 1881.5549888500.

The spelling of 6661173499 in words is "six billion, six hundred sixty-one million, one hundred seventy-three thousand, four hundred ninety-nine".