66611411 has 2 divisors, whose sum is σ = 66611412. Its totient is φ = 66611410.

The previous prime is 66611387. The next prime is 66611431. The reversal of 66611411 is 11411666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66611411 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66611431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33305705 + 33305706.

It is an arithmetic number, because the mean of its divisors is an integer number (33305706).

Almost surely, 2^66611411 is an apocalyptic number.

66611411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66611411 is an equidigital number, since it uses as much as digits as its factorization.

66611411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 66611411 is about 8161.5814031351. The cubic root of 66611411 is about 405.3680766984.

The spelling of 66611411 in words is "sixty-six million, six hundred eleven thousand, four hundred eleven".