66612011 has 2 divisors, whose sum is σ = 66612012. Its totient is φ = 66612010.

The previous prime is 66611977. The next prime is 66612017. The reversal of 66612011 is 11021666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66612011 - 2⁶ = 66611947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66612017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33306005 + 33306006.

It is an arithmetic number, because the mean of its divisors is an integer number (33306006).

Almost surely, 2^66612011 is an apocalyptic number.

66612011 is a deficient number, since it is larger than the sum of its proper divisors (1).

66612011 is an equidigital number, since it uses as much as digits as its factorization.

66612011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 66612011 is about 8161.6181606346. The cubic root of 66612011 is about 405.3692938078.

Adding to 66612011 its reverse (11021666), we get a palindrome (77633677).

The spelling of 66612011 in words is "sixty-six million, six hundred twelve thousand, eleven".