66563411 has 2 divisors, whose sum is σ = 66563412. Its totient is φ = 66563410.

The previous prime is 66563401. The next prime is 66563429. The reversal of 66563411 is 11436566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66563411 - 2¹⁸ = 66301267 is a prime.

It is not a weakly prime, because it can be changed into another prime (66563401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33281705 + 33281706.

It is an arithmetic number, because the mean of its divisors is an integer number (33281706).

Almost surely, 2^66563411 is an apocalyptic number.

66563411 is a deficient number, since it is larger than the sum of its proper divisors (1).

66563411 is an equidigital number, since it uses as much as digits as its factorization.

66563411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 66563411 is about 8158.6402666131. The cubic root of 66563411 is about 405.2706842598.

Adding to 66563411 its reverse (11436566), we get a palindrome (77999977).

The spelling of 66563411 in words is "sixty-six million, five hundred sixty-three thousand, four hundred eleven".