664311463 has 2 divisors, whose sum is σ = 664311464. Its totient is φ = 664311462.

The previous prime is 664311451. The next prime is 664311469. The reversal of 664311463 is 364113466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664311463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664311469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332155731 + 332155732.

It is an arithmetic number, because the mean of its divisors is an integer number (332155732).

Almost surely, 2^664311463 is an apocalyptic number.

664311463 is a deficient number, since it is larger than the sum of its proper divisors (1).

664311463 is an equidigital number, since it uses as much as digits as its factorization.

664311463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 664311463 is about 25774.2402991824. The cubic root of 664311463 is about 872.5505209619.

The spelling of 664311463 in words is "six hundred sixty-four million, three hundred eleven thousand, four hundred sixty-three".