6466643831 has 2 divisors, whose sum is σ = 6466643832. Its totient is φ = 6466643830.

The previous prime is 6466643797. The next prime is 6466643839. The reversal of 6466643831 is 1383466646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6466643831 - 2³⁰ = 5392902007 is a prime.

It is a super-2 number, since 2×6466643831² = 83634964874020713122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6466643839) 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, 3233321915 + 3233321916.

It is an arithmetic number, because the mean of its divisors is an integer number (3233321916).

Almost surely, 2^6466643831 is an apocalyptic number.

6466643831 is a deficient number, since it is larger than the sum of its proper divisors (1).

6466643831 is an equidigital number, since it uses as much as digits as its factorization.

6466643831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 47.

The square root of 6466643831 is about 80415.4452266478. The cubic root of 6466643831 is about 1863.0577360396.

The spelling of 6466643831 in words is "six billion, four hundred sixty-six million, six hundred forty-three thousand, eight hundred thirty-one".