10666115543 has 2 divisors, whose sum is σ = 10666115544. Its totient is φ = 10666115542.

The previous prime is 10666115513. The next prime is 10666115573. The reversal of 10666115543 is 34551166601.

It is a balanced prime because it is at equal distance from previous prime (10666115513) and next prime (10666115573).

It is a cyclic number.

It is not a de Polignac number, because 10666115543 - 2⁶ = 10666115479 is a prime.

It is a super-2 number, since 2×10666115543² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 10666115497 and 10666115506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10666115513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333057771 + 5333057772.

It is an arithmetic number, because the mean of its divisors is an integer number (5333057772).

Almost surely, 2^10666115543 is an apocalyptic number.

10666115543 is a deficient number, since it is larger than the sum of its proper divisors (1).

10666115543 is an equidigital number, since it uses as much as digits as its factorization.

10666115543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 10666115543 in words is "ten billion, six hundred sixty-six million, one hundred fifteen thousand, five hundred forty-three".