66227017 has 2 divisors, whose sum is σ = 66227018. Its totient is φ = 66227016.

The previous prime is 66227011. The next prime is 66227047. The reversal of 66227017 is 71072266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 9511056 = 7531^2 + 3084^2 .

It is a cyclic number.

It is not a de Polignac number, because 66227017 - 2⁷ = 66226889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66227017.

It is not a weakly prime, because it can be changed into another prime (66227011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113508 + 33113509.

It is an arithmetic number, because the mean of its divisors is an integer number (33113509).

Almost surely, 2^66227017 is an apocalyptic number.

It is an amenable number.

66227017 is a deficient number, since it is larger than the sum of its proper divisors (1).

66227017 is an equidigital number, since it uses as much as digits as its factorization.

66227017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 66227017 is about 8137.9983411156. The cubic root of 66227017 is about 404.5868204012.

The spelling of 66227017 in words is "sixty-six million, two hundred twenty-seven thousand, seventeen".