664633408511 has 2 divisors, whose sum is σ = 664633408512. Its totient is φ = 664633408510.

The previous prime is 664633408487. The next prime is 664633408519. The reversal of 664633408511 is 115804336466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664633408511 - 2¹⁸ = 664633146367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664633408519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332316704255 + 332316704256.

It is an arithmetic number, because the mean of its divisors is an integer number (332316704256).

Almost surely, 2^664633408511 is an apocalyptic number.

664633408511 is a deficient number, since it is larger than the sum of its proper divisors (1).

664633408511 is an equidigital number, since it uses as much as digits as its factorization.

664633408511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 664633408511 in words is "six hundred sixty-four billion, six hundred thirty-three million, four hundred eight thousand, five hundred eleven".