666319631303 has 2 divisors, whose sum is σ = 666319631304. Its totient is φ = 666319631302.

The previous prime is 666319631291. The next prime is 666319631333. The reversal of 666319631303 is 303136913666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666319631303 - 2⁶ = 666319631239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666319631333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333159815651 + 333159815652.

It is an arithmetic number, because the mean of its divisors is an integer number (333159815652).

Almost surely, 2^666319631303 is an apocalyptic number.

666319631303 is a deficient number, since it is larger than the sum of its proper divisors (1).

666319631303 is an equidigital number, since it uses as much as digits as its factorization.

666319631303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 47.

The spelling of 666319631303 in words is "six hundred sixty-six billion, three hundred nineteen million, six hundred thirty-one thousand, three hundred three".