66031189497269 has 2 divisors, whose sum is σ = 66031189497270. Its totient is φ = 66031189497268.

The previous prime is 66031189497257. The next prime is 66031189497353. The reversal of 66031189497269 is 96279498113066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64137433702225 + 1893755795044 = 8008585^2 + 1376138^2 .

It is a cyclic number.

It is not a de Polignac number, because 66031189497269 - 2¹⁶ = 66031189431733 is a prime.

It is a super-2 number, since 2×66031189497269² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66031189497239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015594748634 + 33015594748635.

It is an arithmetic number, because the mean of its divisors is an integer number (33015594748635).

Almost surely, 2^{66031189497269} is an apocalyptic number.

It is an amenable number.

66031189497269 is a deficient number, since it is larger than the sum of its proper divisors (1).

66031189497269 is an equidigital number, since it uses as much as digits as its factorization.

66031189497269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211631616, while the sum is 71.

The spelling of 66031189497269 in words is "sixty-six trillion, thirty-one billion, one hundred eighty-nine million, four hundred ninety-seven thousand, two hundred sixty-nine".