1066134565543 has 4 divisors (see below), whose sum is σ = 1067272383520. Its totient is φ = 1064996747568.

The previous prime is 1066134565523. The next prime is 1066134565579. The reversal of 1066134565543 is 3455654316601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066134565543 is a prime.

It is a super-2 number, since 2×1066134565543² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066134565523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568907583 + ... + 568909456.

It is an arithmetic number, because the mean of its divisors is an integer number (266818095880).

Almost surely, 2^{1066134565543} is an apocalyptic number.

1066134565543 is a deficient number, since it is larger than the sum of its proper divisors (1137817977).

1066134565543 is an equidigital number, since it uses as much as digits as its factorization.

1066134565543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137817976.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 1066134565543 in words is "one trillion, sixty-six billion, one hundred thirty-four million, five hundred sixty-five thousand, five hundred forty-three".