6345821966 has 16 divisors (see below), whose sum is σ = 10484892288. Its totient is φ = 2856459000.

The previous prime is 6345821957. The next prime is 6345821981. The reversal of 6345821966 is 6691285436.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1397960 + ... + 1402491.

It is an arithmetic number, because the mean of its divisors is an integer number (655305768).

Almost surely, 2^6345821966 is an apocalyptic number.

6345821966 is a deficient number, since it is larger than the sum of its proper divisors (4139070322).

6345821966 is a wasteful number, since it uses less digits than its factorization.

6345821966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800567.

The product of its digits is 1866240, while the sum is 50.

The square root of 6345821966 is about 79660.6676221082. The cubic root of 6345821966 is about 1851.3816769651.

The spelling of 6345821966 in words is "six billion, three hundred forty-five million, eight hundred twenty-one thousand, nine hundred sixty-six".