663111313 has 4 divisors (see below), whose sum is σ = 663545968. Its totient is φ = 662676660.

The previous prime is 663111311. The next prime is 663111331. The reversal of 663111313 is 313111366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 663111313 - 2¹ = 663111311 is a prime.

It is a super-2 number, since 2×663111313² = 879433226857167938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663111311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215031 + ... + 218092.

It is an arithmetic number, because the mean of its divisors is an integer number (165886492).

Almost surely, 2^663111313 is an apocalyptic number.

It is an amenable number.

663111313 is a deficient number, since it is larger than the sum of its proper divisors (434655).

663111313 is a wasteful number, since it uses less digits than its factorization.

663111313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434654.

The product of its digits is 972, while the sum is 25.

The square root of 663111313 is about 25750.9478077992. The cubic root of 663111313 is about 872.0247521416.

Adding to 663111313 its reverse (313111366), we get a palindrome (976222679).

The spelling of 663111313 in words is "six hundred sixty-three million, one hundred eleven thousand, three hundred thirteen".