66489361583 has 2 divisors, whose sum is σ = 66489361584. Its totient is φ = 66489361582.

The previous prime is 66489361579. The next prime is 66489361591. The reversal of 66489361583 is 38516398466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66489361583 - 2² = 66489361579 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66489361573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33244680791 + 33244680792.

It is an arithmetic number, because the mean of its divisors is an integer number (33244680792).

Almost surely, 2^66489361583 is an apocalyptic number.

66489361583 is a deficient number, since it is larger than the sum of its proper divisors (1).

66489361583 is an equidigital number, since it uses as much as digits as its factorization.

66489361583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 59.

The spelling of 66489361583 in words is "sixty-six billion, four hundred eighty-nine million, three hundred sixty-one thousand, five hundred eighty-three".