66543227 has 2 divisors, whose sum is σ = 66543228. Its totient is φ = 66543226.

The previous prime is 66543221. The next prime is 66543241. The reversal of 66543227 is 72234566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66543227 - 2¹⁴ = 66526843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66543221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33271613 + 33271614.

It is an arithmetic number, because the mean of its divisors is an integer number (33271614).

Almost surely, 2^66543227 is an apocalyptic number.

66543227 is a deficient number, since it is larger than the sum of its proper divisors (1).

66543227 is an equidigital number, since it uses as much as digits as its factorization.

66543227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 35.

The square root of 66543227 is about 8157.4032020000. The cubic root of 66543227 is about 405.2297167557.

The spelling of 66543227 in words is "sixty-six million, five hundred forty-three thousand, two hundred twenty-seven".