664110331 has 2 divisors, whose sum is σ = 664110332. Its totient is φ = 664110330.

The previous prime is 664110323. The next prime is 664110341. The reversal of 664110331 is 133011466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664110331 - 2³ = 664110323 is a prime.

It is a super-2 number, since 2×664110331² = 882085063481859122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664110296 and 664110305.

It is not a weakly prime, because it can be changed into another prime (664110301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332055165 + 332055166.

It is an arithmetic number, because the mean of its divisors is an integer number (332055166).

Almost surely, 2^664110331 is an apocalyptic number.

664110331 is a deficient number, since it is larger than the sum of its proper divisors (1).

664110331 is an equidigital number, since it uses as much as digits as its factorization.

664110331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 664110331 is about 25770.3382011180. The cubic root of 664110331 is about 872.4624520586.

Adding to 664110331 its reverse (133011466), we get a palindrome (797121797).

The spelling of 664110331 in words is "six hundred sixty-four million, one hundred ten thousand, three hundred thirty-one".