66004642555231 has 2 divisors, whose sum is σ = 66004642555232. Its totient is φ = 66004642555230.

The previous prime is 66004642555223. The next prime is 66004642555433. The reversal of 66004642555231 is 13255524640066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66004642555231 - 2³ = 66004642555223 is a prime.

It is a super-2 number, since 2×66004642555231² (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 (66004642556231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33002321277615 + 33002321277616.

It is an arithmetic number, because the mean of its divisors is an integer number (33002321277616).

Almost surely, 2^{66004642555231} is an apocalyptic number.

66004642555231 is a deficient number, since it is larger than the sum of its proper divisors (1).

66004642555231 is an equidigital number, since it uses as much as digits as its factorization.

66004642555231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 66004642555231 in words is "sixty-six trillion, four billion, six hundred forty-two million, five hundred fifty-five thousand, two hundred thirty-one".