6649171171 has 2 divisors, whose sum is σ = 6649171172. Its totient is φ = 6649171170.

The previous prime is 6649171159. The next prime is 6649171219. The reversal of 6649171171 is 1711719466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6649171171 - 2¹¹ = 6649169123 is a prime.

It is a super-2 number, since 2×6649171171² = 88422954522515022482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6649171871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324585585 + 3324585586.

It is an arithmetic number, because the mean of its divisors is an integer number (3324585586).

Almost surely, 2^6649171171 is an apocalyptic number.

6649171171 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649171171 is an equidigital number, since it uses as much as digits as its factorization.

6649171171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 43.

The square root of 6649171171 is about 81542.4501164884. The cubic root of 6649171171 is about 1880.4242262623.

The spelling of 6649171171 in words is "six billion, six hundred forty-nine million, one hundred seventy-one thousand, one hundred seventy-one".