66984227 has 2 divisors, whose sum is σ = 66984228. Its totient is φ = 66984226.

The previous prime is 66984217. The next prime is 66984251. The reversal of 66984227 is 72248966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66984227 - 2⁸ = 66983971 is a prime.

It is not a weakly prime, because it can be changed into another prime (66984217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33492113 + 33492114.

It is an arithmetic number, because the mean of its divisors is an integer number (33492114).

Almost surely, 2^66984227 is an apocalyptic number.

66984227 is a deficient number, since it is larger than the sum of its proper divisors (1).

66984227 is an equidigital number, since it uses as much as digits as its factorization.

66984227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 66984227 is about 8184.3892258372. The cubic root of 66984227 is about 406.1229355043.

The spelling of 66984227 in words is "sixty-six million, nine hundred eighty-four thousand, two hundred twenty-seven".