143666311360021 has 12 divisors (see below), whose sum is σ = 145024508542732. Its totient is φ = 142320717880128.

The previous prime is 143666311360007. The next prime is 143666311360051. The reversal of 143666311360021 is 120063113666341.

143666311360021 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 2 ways, for example, as 79262251614225 + 64404059745796 = 8902935^2 + 8025214^2 .

It is not a de Polignac number, because 143666311360021 - 2¹¹ = 143666311357973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143666311360021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143666311360051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 748817521 + ... + 749009353.

Almost surely, 2^{143666311360021} is an apocalyptic number.

It is an amenable number.

143666311360021 is a deficient number, since it is larger than the sum of its proper divisors (1358197182711).

143666311360021 is an equidigital number, since it uses as much as digits as its factorization.

143666311360021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257460 (or 257353 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 143666311360021 in words is "one hundred forty-three trillion, six hundred sixty-six billion, three hundred eleven million, three hundred sixty thousand, twenty-one".