66434562622609 has 2 divisors, whose sum is σ = 66434562622610. Its totient is φ = 66434562622608.

The previous prime is 66434562622591. The next prime is 66434562622639. The reversal of 66434562622609 is 90622626543466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55776296532609 + 10658266090000 = 7468353^2 + 3264700^2 .

It is a cyclic number.

It is not a de Polignac number, because 66434562622609 - 2²⁹ = 66434025751697 is a prime.

It is a super-2 number, since 2×66434562622609² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66434562622639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33217281311304 + 33217281311305.

It is an arithmetic number, because the mean of its divisors is an integer number (33217281311305).

Almost surely, 2^{66434562622609} is an apocalyptic number.

It is an amenable number.

66434562622609 is a deficient number, since it is larger than the sum of its proper divisors (1).

66434562622609 is an equidigital number, since it uses as much as digits as its factorization.

66434562622609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134369280, while the sum is 61.

The spelling of 66434562622609 in words is "sixty-six trillion, four hundred thirty-four billion, five hundred sixty-two million, six hundred twenty-two thousand, six hundred nine".