664147327 has 2 divisors, whose sum is σ = 664147328. Its totient is φ = 664147326.

The previous prime is 664147291. The next prime is 664147331. The reversal of 664147327 is 723741466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664147327 is a prime.

It is a super-2 number, since 2×664147327² = 882183343922489858, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664147327.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664147387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332073663 + 332073664.

It is an arithmetic number, because the mean of its divisors is an integer number (332073664).

Almost surely, 2^664147327 is an apocalyptic number.

664147327 is a deficient number, since it is larger than the sum of its proper divisors (1).

664147327 is an equidigital number, since it uses as much as digits as its factorization.

664147327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 664147327 is about 25771.0559931098. The cubic root of 664147327 is about 872.4786526907.

The spelling of 664147327 in words is "six hundred sixty-four million, one hundred forty-seven thousand, three hundred twenty-seven".