666245353 has 2 divisors, whose sum is σ = 666245354. Its totient is φ = 666245352.

The previous prime is 666245323. The next prime is 666245381. The reversal of 666245353 is 353542666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561121344 + 105124009 = 23688^2 + 10253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666245353 is a prime.

It is not a weakly prime, because it can be changed into another prime (666245323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333122676 + 333122677.

It is an arithmetic number, because the mean of its divisors is an integer number (333122677).

Almost surely, 2^666245353 is an apocalyptic number.

It is an amenable number.

666245353 is a deficient number, since it is larger than the sum of its proper divisors (1).

666245353 is an equidigital number, since it uses as much as digits as its factorization.

666245353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 40.

The square root of 666245353 is about 25811.7289812209. The cubic root of 666245353 is about 873.3964002620.

The spelling of 666245353 in words is "six hundred sixty-six million, two hundred forty-five thousand, three hundred fifty-three".