664241143 has 6 divisors (see below), whose sum is σ = 687936704. Its totient is φ = 641335464.

The previous prime is 664241141. The next prime is 664241161. The reversal of 664241143 is 341142466.

It is not a de Polignac number, because 664241143 - 2¹ = 664241141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664241141) 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 5 ways as a sum of consecutive naturals, for example, 394071 + ... + 395752.

Almost surely, 2^664241143 is an apocalyptic number.

664241143 is a deficient number, since it is larger than the sum of its proper divisors (23695561).

664241143 is an equidigital number, since it uses as much as digits as its factorization.

664241143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789881 (or 789852 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 664241143 is about 25772.8761103607. The cubic root of 664241143 is about 872.5197322325.

The spelling of 664241143 in words is "six hundred sixty-four million, two hundred forty-one thousand, one hundred forty-three".