6400719166 has 16 divisors (see below), whose sum is σ = 9963910800. Its totient is φ = 3080121408.

The previous prime is 6400719161. The next prime is 6400719179. The reversal of 6400719166 is 6619170046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400719161) 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 in 7 ways as a sum of consecutive naturals, for example, 158136 + ... + 194443.

It is an arithmetic number, because the mean of its divisors is an integer number (622744425).

Almost surely, 2^6400719166 is an apocalyptic number.

6400719166 is a deficient number, since it is larger than the sum of its proper divisors (3563191634).

6400719166 is a wasteful number, since it uses less digits than its factorization.

6400719166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352923.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 6400719166 is about 80004.4946612376. The cubic root of 6400719166 is about 1856.7050740253.

The spelling of 6400719166 in words is "six billion, four hundred million, seven hundred nineteen thousand, one hundred sixty-six".