66511283 has 2 divisors, whose sum is σ = 66511284. Its totient is φ = 66511282.

The previous prime is 66511279. The next prime is 66511363. The reversal of 66511283 is 38211566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66511283 - 2² = 66511279 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66511253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33255641 + 33255642.

It is an arithmetic number, because the mean of its divisors is an integer number (33255642).

Almost surely, 2^66511283 is an apocalyptic number.

66511283 is a deficient number, since it is larger than the sum of its proper divisors (1).

66511283 is an equidigital number, since it uses as much as digits as its factorization.

66511283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 66511283 is about 8155.4449909248. Note that the first 3 decimals coincide. The cubic root of 66511283 is about 405.1648630230.

The spelling of 66511283 in words is "sixty-six million, five hundred eleven thousand, two hundred eighty-three".