66040822531 has 2 divisors, whose sum is σ = 66040822532. Its totient is φ = 66040822530.

The previous prime is 66040822511. The next prime is 66040822567. The reversal of 66040822531 is 13522804066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66040822531 - 2¹⁷ = 66040691459 is a prime.

It is a super-2 number, since 2×66040822531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66040822511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33020411265 + 33020411266.

It is an arithmetic number, because the mean of its divisors is an integer number (33020411266).

Almost surely, 2^66040822531 is an apocalyptic number.

66040822531 is a deficient number, since it is larger than the sum of its proper divisors (1).

66040822531 is an equidigital number, since it uses as much as digits as its factorization.

66040822531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 66040822531 in words is "sixty-six billion, forty million, eight hundred twenty-two thousand, five hundred thirty-one".