6611771197 has 2 divisors, whose sum is σ = 6611771198. Its totient is φ = 6611771196.

The previous prime is 6611771143. The next prime is 6611771209. The reversal of 6611771197 is 7911771166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6564078361 + 47692836 = 81019^2 + 6906^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611771197 - 2³¹ = 4464287549 is a prime.

It is a super-2 number, since 2×6611771197² = 87431036722957625618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6611775197) 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 as a sum of consecutive naturals, namely, 3305885598 + 3305885599.

It is an arithmetic number, because the mean of its divisors is an integer number (3305885599).

Almost surely, 2^6611771197 is an apocalyptic number.

It is an amenable number.

6611771197 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611771197 is an equidigital number, since it uses as much as digits as its factorization.

6611771197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 46.

The square root of 6611771197 is about 81312.7984821578. The cubic root of 6611771197 is about 1876.8919519422.

The spelling of 6611771197 in words is "six billion, six hundred eleven million, seven hundred seventy-one thousand, one hundred ninety-seven".