143666206389 has 40 divisors (see below), whose sum is σ = 228023662680. Its totient is φ = 90143252352.

The previous prime is 143666206319. The next prime is 143666206429. The reversal of 143666206389 is 983602666341.

143666206389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1203743025 + 142462463364 = 34695^2 + 377442^2 .

It is not a de Polignac number, because 143666206389 - 2²⁷ = 143531988661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143666206309) 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 39 ways as a sum of consecutive naturals, for example, 217447 + ... + 578459.

It is an arithmetic number, because the mean of its divisors is an integer number (5700591567).

Almost surely, 2^143666206389 is an apocalyptic number.

It is an amenable number.

143666206389 is a deficient number, since it is larger than the sum of its proper divisors (84357456291).

143666206389 is an frugal number, since it uses more digits than its factorization.

143666206389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361076 (or 361033 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 54.

The spelling of 143666206389 in words is "one hundred forty-three billion, six hundred sixty-six million, two hundred six thousand, three hundred eighty-nine".