66326549603 has 2 divisors, whose sum is σ = 66326549604. Its totient is φ = 66326549602.

The previous prime is 66326549591. The next prime is 66326549617. The reversal of 66326549603 is 30694562366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66326549603 - 2⁴ = 66326549587 is a prime.

It is a super-2 number, since 2×66326549603² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66326549683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33163274801 + 33163274802.

It is an arithmetic number, because the mean of its divisors is an integer number (33163274802).

Almost surely, 2^66326549603 is an apocalyptic number.

66326549603 is a deficient number, since it is larger than the sum of its proper divisors (1).

66326549603 is an equidigital number, since it uses as much as digits as its factorization.

66326549603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 50.

The spelling of 66326549603 in words is "sixty-six billion, three hundred twenty-six million, five hundred forty-nine thousand, six hundred three".