663245377 has 2 divisors, whose sum is σ = 663245378. Its totient is φ = 663245376.

The previous prime is 663245371. The next prime is 663245381. The reversal of 663245377 is 773542366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579413041 + 83832336 = 24071^2 + 9156^2 .

It is a cyclic number.

It is not a de Polignac number, because 663245377 - 2⁷ = 663245249 is a prime.

It is a super-2 number, since 2×663245377² = 879788860223744258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (663245371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331622688 + 331622689.

It is an arithmetic number, because the mean of its divisors is an integer number (331622689).

Almost surely, 2^663245377 is an apocalyptic number.

It is an amenable number.

663245377 is a deficient number, since it is larger than the sum of its proper divisors (1).

663245377 is an equidigital number, since it uses as much as digits as its factorization.

663245377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 43.

The square root of 663245377 is about 25753.5507648945. The cubic root of 663245377 is about 872.0835151509.

The spelling of 663245377 in words is "six hundred sixty-three million, two hundred forty-five thousand, three hundred seventy-seven".