66873554141 has 4 divisors (see below), whose sum is σ = 66874094112. Its totient is φ = 66873014172.

The previous prime is 66873554129. The next prime is 66873554171. The reversal of 66873554141 is 14145537866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14145537866 = 2 ⋅7072768933.

It is a cyclic number.

It is not a de Polignac number, because 66873554141 - 2¹⁸ = 66873291997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66873554141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66873554101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18626 + ... + 366188.

It is an arithmetic number, because the mean of its divisors is an integer number (16718523528).

Almost surely, 2^66873554141 is an apocalyptic number.

It is an amenable number.

66873554141 is a deficient number, since it is larger than the sum of its proper divisors (539971).

66873554141 is a wasteful number, since it uses less digits than its factorization.

66873554141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539970.

The product of its digits is 2419200, while the sum is 50.

The spelling of 66873554141 in words is "sixty-six billion, eight hundred seventy-three million, five hundred fifty-four thousand, one hundred forty-one".