66765552045319 has 2 divisors, whose sum is σ = 66765552045320. Its totient is φ = 66765552045318.

The previous prime is 66765552045307. The next prime is 66765552045349. The reversal of 66765552045319 is 91354025556766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66765552045319 - 2³⁵ = 66731192306951 is a prime.

It is a super-2 number, since 2×66765552045319² (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 (66765552045349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33382776022659 + 33382776022660.

It is an arithmetic number, because the mean of its divisors is an integer number (33382776022660).

Almost surely, 2^{66765552045319} is an apocalyptic number.

66765552045319 is a deficient number, since it is larger than the sum of its proper divisors (1).

66765552045319 is an equidigital number, since it uses as much as digits as its factorization.

66765552045319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120000, while the sum is 64.

The spelling of 66765552045319 in words is "sixty-six trillion, seven hundred sixty-five billion, five hundred fifty-two million, forty-five thousand, three hundred nineteen".