66403369663 has 2 divisors, whose sum is σ = 66403369664. Its totient is φ = 66403369662.

The previous prime is 66403369649. The next prime is 66403369687. The reversal of 66403369663 is 36696330466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66403369663 - 2⁵ = 66403369631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66403369663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66403319663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33201684831 + 33201684832.

It is an arithmetic number, because the mean of its divisors is an integer number (33201684832).

Almost surely, 2^66403369663 is an apocalyptic number.

66403369663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66403369663 is an equidigital number, since it uses as much as digits as its factorization.

66403369663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 52.

The spelling of 66403369663 in words is "sixty-six billion, four hundred three million, three hundred sixty-nine thousand, six hundred sixty-three".