66589498601 has 2 divisors, whose sum is σ = 66589498602. Its totient is φ = 66589498600.

The previous prime is 66589498543. The next prime is 66589498709. The reversal of 66589498601 is 10689498566.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61931299600 + 4658199001 = 248860^2 + 68251^2 .

It is a cyclic number.

It is not a de Polignac number, because 66589498601 - 2¹⁰ = 66589497577 is a prime.

It is a super-2 number, since 2×66589498601² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66589492601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33294749300 + 33294749301.

It is an arithmetic number, because the mean of its divisors is an integer number (33294749301).

Almost surely, 2^66589498601 is an apocalyptic number.

It is an amenable number.

66589498601 is a deficient number, since it is larger than the sum of its proper divisors (1).

66589498601 is an equidigital number, since it uses as much as digits as its factorization.

66589498601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22394880, while the sum is 62.

The spelling of 66589498601 in words is "sixty-six billion, five hundred eighty-nine million, four hundred ninety-eight thousand, six hundred one".