66627489013 has 2 divisors, whose sum is σ = 66627489014. Its totient is φ = 66627489012.

The previous prime is 66627488971. The next prime is 66627489029. The reversal of 66627489013 is 31098472666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55846197124 + 10781291889 = 236318^2 + 103833^2 .

It is a cyclic number.

It is not a de Polignac number, because 66627489013 - 2²⁵ = 66593934581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66627289013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33313744506 + 33313744507.

It is an arithmetic number, because the mean of its divisors is an integer number (33313744507).

Almost surely, 2^66627489013 is an apocalyptic number.

It is an amenable number.

66627489013 is a deficient number, since it is larger than the sum of its proper divisors (1).

66627489013 is an equidigital number, since it uses as much as digits as its factorization.

66627489013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 66627489013 in words is "sixty-six billion, six hundred twenty-seven million, four hundred eighty-nine thousand, thirteen".