666550122143 has 16 divisors (see below), whose sum is σ = 677924064000. Its totient is φ = 655238808000.

The previous prime is 666550122137. The next prime is 666550122169. The reversal of 666550122143 is 341221055666.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 666550122143 - 2¹⁰ = 666550121119 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 666550122143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666550122113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58986308 + ... + 58997606.

It is an arithmetic number, because the mean of its divisors is an integer number (42370254000).

Almost surely, 2^666550122143 is an apocalyptic number.

666550122143 is a deficient number, since it is larger than the sum of its proper divisors (11373941857).

666550122143 is a wasteful number, since it uses less digits than its factorization.

666550122143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13982.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 666550122143 in words is "six hundred sixty-six billion, five hundred fifty million, one hundred twenty-two thousand, one hundred forty-three".