66903321769 has 2 divisors, whose sum is σ = 66903321770. Its totient is φ = 66903321768.

The previous prime is 66903321767. The next prime is 66903321791. The reversal of 66903321769 is 96712330966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64002422169 + 2900899600 = 252987^2 + 53860^2 .

It is a cyclic number.

It is not a de Polignac number, because 66903321769 - 2¹ = 66903321767 is a prime.

It is a super-2 number, since 2×66903321769² (a number of 22 digits) contains 22 as substring.

Together with 66903321767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66903321767) 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, 33451660884 + 33451660885.

It is an arithmetic number, because the mean of its divisors is an integer number (33451660885).

Almost surely, 2^66903321769 is an apocalyptic number.

It is an amenable number.

66903321769 is a deficient number, since it is larger than the sum of its proper divisors (1).

66903321769 is an equidigital number, since it uses as much as digits as its factorization.

66903321769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 66903321769 in words is "sixty-six billion, nine hundred three million, three hundred twenty-one thousand, seven hundred sixty-nine".