40566533566529 has 2 divisors, whose sum is σ = 40566533566530. Its totient is φ = 40566533566528.

The previous prime is 40566533566457. The next prime is 40566533566567. The reversal of 40566533566529 is 92566533566504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182629406529 + 383904160000 = 6338977^2 + 619600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40566533566529 is a prime.

It is not a weakly prime, because it can be changed into another prime (40566533565529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20283266783264 + 20283266783265.

It is an arithmetic number, because the mean of its divisors is an integer number (20283266783265).

Almost surely, 2^{40566533566529} is an apocalyptic number.

It is an amenable number.

40566533566529 is a deficient number, since it is larger than the sum of its proper divisors (1).

40566533566529 is an equidigital number, since it uses as much as digits as its factorization.

40566533566529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880000, while the sum is 65.

The spelling of 40566533566529 in words is "forty trillion, five hundred sixty-six billion, five hundred thirty-three million, five hundred sixty-six thousand, five hundred twenty-nine".