660332227 has 2 divisors, whose sum is σ = 660332228. Its totient is φ = 660332226.

The previous prime is 660332219. The next prime is 660332249. The reversal of 660332227 is 722233066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660332227 - 2³ = 660332219 is a prime.

It is not a weakly prime, because it can be changed into another prime (660332287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330166113 + 330166114.

It is an arithmetic number, because the mean of its divisors is an integer number (330166114).

Almost surely, 2^660332227 is an apocalyptic number.

660332227 is a deficient number, since it is larger than the sum of its proper divisors (1).

660332227 is an equidigital number, since it uses as much as digits as its factorization.

660332227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 660332227 is about 25696.9303030537. The cubic root of 660332227 is about 870.8048336778.

The spelling of 660332227 in words is "six hundred sixty million, three hundred thirty-two thousand, two hundred twenty-seven".