66181411 has 2 divisors, whose sum is σ = 66181412. Its totient is φ = 66181410.

The previous prime is 66181403. The next prime is 66181457. The reversal of 66181411 is 11418166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66181411 - 2³ = 66181403 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66181411.

It is not a weakly prime, because it can be changed into another prime (66181481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33090705 + 33090706.

It is an arithmetic number, because the mean of its divisors is an integer number (33090706).

Almost surely, 2^66181411 is an apocalyptic number.

66181411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66181411 is an equidigital number, since it uses as much as digits as its factorization.

66181411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 66181411 is about 8135.1958181718. The cubic root of 66181411 is about 404.4939286860.

Adding to 66181411 its reverse (11418166), we get a palindrome (77599577).

It can be divided in two parts, 661814 and 11, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 66181411 in words is "sixty-six million, one hundred eighty-one thousand, four hundred eleven".