6661131079 has 2 divisors, whose sum is σ = 6661131080. Its totient is φ = 6661131078.

The previous prime is 6661131067. The next prime is 6661131137. The reversal of 6661131079 is 9701311666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6661131079 - 2⁵ = 6661131047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6661131679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330565539 + 3330565540.

It is an arithmetic number, because the mean of its divisors is an integer number (3330565540).

Almost surely, 2^6661131079 is an apocalyptic number.

6661131079 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661131079 is an equidigital number, since it uses as much as digits as its factorization.

6661131079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 6661131079 is about 81615.7526400388. The cubic root of 6661131079 is about 1881.5509947724.

The spelling of 6661131079 in words is "six billion, six hundred sixty-one million, one hundred thirty-one thousand, seventy-nine".