663333413 has 2 divisors, whose sum is σ = 663333414. Its totient is φ = 663333412.

The previous prime is 663333397. The next prime is 663333431. The reversal of 663333413 is 314333366.

Together with next prime (663333431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536478244 + 126855169 = 23162^2 + 11263^2 .

It is a cyclic number.

It is not a de Polignac number, because 663333413 - 2⁴ = 663333397 is a prime.

It is a super-2 number, since 2×663333413² = 880022433604457138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_34450439 and since 663333413 and 34450439 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663333413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663333113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331666706 + 331666707.

It is an arithmetic number, because the mean of its divisors is an integer number (331666707).

Almost surely, 2^663333413 is an apocalyptic number.

It is an amenable number.

663333413 is a deficient number, since it is larger than the sum of its proper divisors (1).

663333413 is an equidigital number, since it uses as much as digits as its factorization.

663333413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 32.

The square root of 663333413 is about 25755.2599093855. The cubic root of 663333413 is about 872.1220988336.

Adding to 663333413 its reverse (314333366), we get a palindrome (977666779).

The spelling of 663333413 in words is "six hundred sixty-three million, three hundred thirty-three thousand, four hundred thirteen".