143243136666 has 160 divisors (see below), whose sum is σ = 374206884480. Its totient is φ = 40107239424.

The previous prime is 143243136581. The next prime is 143243136709. The reversal of 143243136666 is 666631342341.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 22544146 + ... + 22550498.

It is an arithmetic number, because the mean of its divisors is an integer number (2338793028).

Almost surely, 2^143243136666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 143243136666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187103442240).

143243136666 is an abundant number, since it is smaller than the sum of its proper divisors (230963747814).

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

143243136666 is a wasteful number, since it uses less digits than its factorization.

143243136666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770 (or 6761 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 45.

The spelling of 143243136666 in words is "one hundred forty-three billion, two hundred forty-three million, one hundred thirty-six thousand, six hundred sixty-six".