6441742866 has 32 divisors (see below), whose sum is σ = 13894211520. Its totient is φ = 1979262144.

The previous prime is 6441742859. The next prime is 6441742913. The reversal of 6441742866 is 6682471446.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 2940 + ... + 113543.

It is an arithmetic number, because the mean of its divisors is an integer number (434194110).

Almost surely, 2^6441742866 is an apocalyptic number.

6441742866 is an abundant number, since it is smaller than the sum of its proper divisors (7452468654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6441742866 is a wasteful number, since it uses less digits than its factorization.

6441742866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117210.

The product of its digits is 1548288, while the sum is 48.

The square root of 6441742866 is about 80260.4688872424. The cubic root of 6441742866 is about 1860.6633146977.

The spelling of 6441742866 in words is "six billion, four hundred forty-one million, seven hundred forty-two thousand, eight hundred sixty-six".