66044610520519 has 2 divisors, whose sum is σ = 66044610520520. Its totient is φ = 66044610520518.

The previous prime is 66044610520423. The next prime is 66044610520523. The reversal of 66044610520519 is 91502501644066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66044610520519 - 2⁷ = 66044610520391 is a prime.

It is a super-2 number, since 2×66044610520519² (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 (66044610520219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33022305260259 + 33022305260260.

It is an arithmetic number, because the mean of its divisors is an integer number (33022305260260).

Almost surely, 2^{66044610520519} is an apocalyptic number.

66044610520519 is a deficient number, since it is larger than the sum of its proper divisors (1).

66044610520519 is an equidigital number, since it uses as much as digits as its factorization.

66044610520519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 66044610520519 in words is "sixty-six trillion, forty-four billion, six hundred ten million, five hundred twenty thousand, five hundred nineteen".