66297227 has 2 divisors, whose sum is σ = 66297228. Its totient is φ = 66297226.

The previous prime is 66297221. The next prime is 66297239. The reversal of 66297227 is 72279266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66297227 - 2¹⁸ = 66035083 is a prime.

It is not a weakly prime, because it can be changed into another prime (66297221) 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, 33148613 + 33148614.

It is an arithmetic number, because the mean of its divisors is an integer number (33148614).

Almost surely, 2^66297227 is an apocalyptic number.

66297227 is a deficient number, since it is larger than the sum of its proper divisors (1).

66297227 is an equidigital number, since it uses as much as digits as its factorization.

66297227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 66297227 is about 8142.3109127569. The cubic root of 66297227 is about 404.7297429813.

The spelling of 66297227 in words is "sixty-six million, two hundred ninety-seven thousand, two hundred twenty-seven".