66004638361111 has 2 divisors, whose sum is σ = 66004638361112. Its totient is φ = 66004638361110.

The previous prime is 66004638361091. The next prime is 66004638361121. The reversal of 66004638361111 is 11116383640066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66004638361111 - 2¹¹ = 66004638359063 is a prime.

It is a super-2 number, since 2×66004638361111² (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 (66004638361121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33002319180555 + 33002319180556.

It is an arithmetic number, because the mean of its divisors is an integer number (33002319180556).

Almost surely, 2^{66004638361111} is an apocalyptic number.

66004638361111 is a deficient number, since it is larger than the sum of its proper divisors (1).

66004638361111 is an equidigital number, since it uses as much as digits as its factorization.

66004638361111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 66004638361111 in words is "sixty-six trillion, four billion, six hundred thirty-eight million, three hundred sixty-one thousand, one hundred eleven".