66526358543 has 2 divisors, whose sum is σ = 66526358544. Its totient is φ = 66526358542.

The previous prime is 66526358537. The next prime is 66526358557. The reversal of 66526358543 is 34585362566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66526358543 - 2¹⁰ = 66526357519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66526358243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33263179271 + 33263179272.

It is an arithmetic number, because the mean of its divisors is an integer number (33263179272).

Almost surely, 2^66526358543 is an apocalyptic number.

66526358543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66526358543 is an equidigital number, since it uses as much as digits as its factorization.

66526358543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552000, while the sum is 53.

The spelling of 66526358543 in words is "sixty-six billion, five hundred twenty-six million, three hundred fifty-eight thousand, five hundred forty-three".