667546161543 has 16 divisors (see below), whose sum is σ = 989158521600. Its totient is φ = 444940214040.

The previous prime is 667546161521. The next prime is 667546161559. The reversal of 667546161543 is 345161645766.

667546161543 is a `hidden beast` number, since 6 + 6 + 7 + 5 + 4 + 616 + 15 + 4 + 3 = 666.

667546161543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667546161543 - 2⁶ = 667546161479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667546161543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667546161563) 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, 2380293 + ... + 2645918.

It is an arithmetic number, because the mean of its divisors is an integer number (61822407600).

Almost surely, 2^667546161543 is an apocalyptic number.

667546161543 is a deficient number, since it is larger than the sum of its proper divisors (321612360057).

667546161543 is a wasteful number, since it uses less digits than its factorization.

667546161543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031139 (or 5031133 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 667546161543 in words is "six hundred sixty-seven billion, five hundred forty-six million, one hundred sixty-one thousand, five hundred forty-three".