66800011 has 2 divisors, whose sum is σ = 66800012. Its totient is φ = 66800010.

The previous prime is 66800003. The next prime is 66800017. The reversal of 66800011 is 11000866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66800011 - 2³ = 66800003 is a prime.

It is a super-3 number, since 3×66800011³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (66800017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33400005 + 33400006.

It is an arithmetic number, because the mean of its divisors is an integer number (33400006).

Almost surely, 2^66800011 is an apocalyptic number.

66800011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66800011 is an equidigital number, since it uses as much as digits as its factorization.

66800011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 66800011 is about 8173.1273696181. The cubic root of 66800011 is about 405.7502953852.

Adding to 66800011 its reverse (11000866), we get a palindrome (77800877).

The spelling of 66800011 in words is "sixty-six million, eight hundred thousand, eleven".