666224059 has 2 divisors, whose sum is σ = 666224060. Its totient is φ = 666224058.

The previous prime is 666224021. The next prime is 666224063. The reversal of 666224059 is 950422666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666224059 is a prime.

It is a super-3 number, since 3×666224059³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (666224089) 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, 333112029 + 333112030.

It is an arithmetic number, because the mean of its divisors is an integer number (333112030).

Almost surely, 2^666224059 is an apocalyptic number.

666224059 is a deficient number, since it is larger than the sum of its proper divisors (1).

666224059 is an equidigital number, since it uses as much as digits as its factorization.

666224059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 666224059 is about 25811.3164910277. The cubic root of 666224059 is about 873.3870952310.

The spelling of 666224059 in words is "six hundred sixty-six million, two hundred twenty-four thousand, fifty-nine".