664621303 has 2 divisors, whose sum is σ = 664621304. Its totient is φ = 664621302.

The previous prime is 664621301. The next prime is 664621337. The reversal of 664621303 is 303126466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664621303 - 2¹ = 664621301 is a prime.

Together with 664621301, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664621301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332310651 + 332310652.

It is an arithmetic number, because the mean of its divisors is an integer number (332310652).

Almost surely, 2^664621303 is an apocalyptic number.

664621303 is a deficient number, since it is larger than the sum of its proper divisors (1).

664621303 is an equidigital number, since it uses as much as digits as its factorization.

664621303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 664621303 is about 25780.2502509188. The cubic root of 664621303 is about 872.6861546459.

Adding to 664621303 its reverse (303126466), we get a palindrome (967747769).

The spelling of 664621303 in words is "six hundred sixty-four million, six hundred twenty-one thousand, three hundred three".