664761718333411 has 2 divisors, whose sum is σ = 664761718333412. Its totient is φ = 664761718333410.

The previous prime is 664761718333399. The next prime is 664761718333463. The reversal of 664761718333411 is 114333817167466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664761718333411 - 2⁵ = 664761718333379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664761718333411.

It is not a weakly prime, because it can be changed into another prime (664761718333481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332380859166705 + 332380859166706.

It is an arithmetic number, because the mean of its divisors is an integer number (332380859166706).

Almost surely, 2^{664761718333411} is an apocalyptic number.

664761718333411 is a deficient number, since it is larger than the sum of its proper divisors (1).

664761718333411 is an equidigital number, since it uses as much as digits as its factorization.

664761718333411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36578304, while the sum is 61.

The spelling of 664761718333411 in words is "six hundred sixty-four trillion, seven hundred sixty-one billion, seven hundred eighteen million, three hundred thirty-three thousand, four hundred eleven".