6466822491 has 16 divisors (see below), whose sum is σ = 9444448800. Its totient is φ = 3917695488.

The previous prime is 6466822477. The next prime is 6466822541. The reversal of 6466822491 is 1942286646.

It is not a de Polignac number, because 6466822491 - 2¹⁰ = 6466821467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6466822491.

It is not an unprimeable number, because it can be changed into a prime (6466822091) 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 in 15 ways as a sum of consecutive naturals, for example, 2184736 + ... + 2187693.

It is an arithmetic number, because the mean of its divisors is an integer number (590278050).

Almost surely, 2^6466822491 is an apocalyptic number.

6466822491 is a deficient number, since it is larger than the sum of its proper divisors (2977626309).

6466822491 is a wasteful number, since it uses less digits than its factorization.

6466822491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372478.

The product of its digits is 995328, while the sum is 48.

The square root of 6466822491 is about 80416.5560752262. The cubic root of 6466822491 is about 1863.0748933594.

The spelling of 6466822491 in words is "six billion, four hundred sixty-six million, eight hundred twenty-two thousand, four hundred ninety-one".