66017526112631 has 2 divisors, whose sum is σ = 66017526112632. Its totient is φ = 66017526112630.

The previous prime is 66017526112607. The next prime is 66017526112649. The reversal of 66017526112631 is 13621162571066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66017526112631 is a prime.

It is a super-2 number, since 2×66017526112631² (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 (66017526112651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33008763056315 + 33008763056316.

It is an arithmetic number, because the mean of its divisors is an integer number (33008763056316).

Almost surely, 2^{66017526112631} is an apocalyptic number.

66017526112631 is a deficient number, since it is larger than the sum of its proper divisors (1).

66017526112631 is an equidigital number, since it uses as much as digits as its factorization.

66017526112631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

Adding to 66017526112631 its reverse (13621162571066), we get a palindrome (79638688683697).

The spelling of 66017526112631 in words is "sixty-six trillion, seventeen billion, five hundred twenty-six million, one hundred twelve thousand, six hundred thirty-one".