666224603999 has 2 divisors, whose sum is σ = 666224604000. Its totient is φ = 666224603998.

The previous prime is 666224603971. The next prime is 666224604007. The reversal of 666224603999 is 999306422666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666224603999 - 2¹² = 666224599903 is a prime.

It is a super-3 number, since 3×666224603999³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666224603899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333112301999 + 333112302000.

It is an arithmetic number, because the mean of its divisors is an integer number (333112302000).

Almost surely, 2^666224603999 is an apocalyptic number.

666224603999 is a deficient number, since it is larger than the sum of its proper divisors (1).

666224603999 is an equidigital number, since it uses as much as digits as its factorization.

666224603999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45349632, while the sum is 62.

The spelling of 666224603999 in words is "six hundred sixty-six billion, two hundred twenty-four million, six hundred three thousand, nine hundred ninety-nine".