664116413 has 2 divisors, whose sum is σ = 664116414. Its totient is φ = 664116412.

The previous prime is 664116403. The next prime is 664116451. The reversal of 664116413 is 314611466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649077529 + 15038884 = 25477^2 + 3878^2 .

It is a cyclic number.

It is not a de Polignac number, because 664116413 - 2²⁴ = 647339197 is a prime.

It is a super-2 number, since 2×664116413² = 882101220031973138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664116413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664116403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332058206 + 332058207.

It is an arithmetic number, because the mean of its divisors is an integer number (332058207).

Almost surely, 2^664116413 is an apocalyptic number.

It is an amenable number.

664116413 is a deficient number, since it is larger than the sum of its proper divisors (1).

664116413 is an equidigital number, since it uses as much as digits as its factorization.

664116413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 664116413 is about 25770.4562047318. The cubic root of 664116413 is about 872.4651154215.

Adding to 664116413 its reverse (314611466), we get a palindrome (978727879).

The spelling of 664116413 in words is "six hundred sixty-four million, one hundred sixteen thousand, four hundred thirteen".