66533566533566 has 32 divisors (see below), whose sum is σ = 109863066120192. Its totient is φ = 29968118026560.

The previous prime is 66533566533563. The next prime is 66533566533719.

66533566533566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66533566533496 and 66533566533505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66533566533563) 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, 12086591 + ... + 16707866.

It is an arithmetic number, because the mean of its divisors is an integer number (3433220816256).

Almost surely, 2^{66533566533566} is an apocalyptic number.

66533566533566 is a deficient number, since it is larger than the sum of its proper divisors (43329499586626).

66533566533566 is a wasteful number, since it uses less digits than its factorization.

66533566533566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28795424.

The product of its digits is 2361960000, while the sum is 68.

The spelling of 66533566533566 in words is "sixty-six trillion, five hundred thirty-three billion, five hundred sixty-six million, five hundred thirty-three thousand, five hundred sixty-six".