143666105220324 has 120 divisors (see below), whose sum is σ = 377149377943800. Its totient is φ = 47687689820160.

The previous prime is 143666105220307. The next prime is 143666105220329. The reversal of 143666105220324 is 423022501666341.

It can be written as a sum of positive squares in 4 ways, for example, as 28073890310400 + 115592214909924 = 5298480^2 + 10751382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 143666105220324.

It is not an unprimeable number, because it can be changed into a prime (143666105220329) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 180975582 + ... + 181767690.

It is an arithmetic number, because the mean of its divisors is an integer number (3142911482865).

Almost surely, 2^{143666105220324} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143666105220324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188574688971900).

143666105220324 is an abundant number, since it is smaller than the sum of its proper divisors (233483272723476).

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

143666105220324 is a wasteful number, since it uses less digits than its factorization.

143666105220324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794475 (or 794464 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

Adding to 143666105220324 its reverse (423022501666341), we get a palindrome (566688606886665).

The spelling of 143666105220324 in words is "one hundred forty-three trillion, six hundred sixty-six billion, one hundred five million, two hundred twenty thousand, three hundred twenty-four".