6664566143 has 4 divisors (see below), whose sum is σ = 6790312728. Its totient is φ = 6538819560.

The previous prime is 6664566137. The next prime is 6664566149. The reversal of 6664566143 is 3416654666.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6664566137) and next prime (6664566149).

It is a cyclic number.

It is not a de Polignac number, because 6664566143 - 2⁶ = 6664566079 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 (6664566149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62873213 + ... + 62873318.

It is an arithmetic number, because the mean of its divisors is an integer number (1697578182).

Almost surely, 2^6664566143 is an apocalyptic number.

6664566143 is a deficient number, since it is larger than the sum of its proper divisors (125746585).

6664566143 is a wasteful number, since it uses less digits than its factorization.

6664566143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125746584.

The product of its digits is 1866240, while the sum is 47.

The square root of 6664566143 is about 81636.7940514570. The cubic root of 6664566143 is about 1881.8743701532.

The spelling of 6664566143 in words is "six billion, six hundred sixty-four million, five hundred sixty-six thousand, one hundred forty-three".