668783412511 has 2 divisors, whose sum is σ = 668783412512. Its totient is φ = 668783412510.

The previous prime is 668783412463. The next prime is 668783412533. The reversal of 668783412511 is 115214387866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668783412511 - 2⁹ = 668783411999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668783412541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334391706255 + 334391706256.

It is an arithmetic number, because the mean of its divisors is an integer number (334391706256).

Almost surely, 2^668783412511 is an apocalyptic number.

668783412511 is a deficient number, since it is larger than the sum of its proper divisors (1).

668783412511 is an equidigital number, since it uses as much as digits as its factorization.

668783412511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 52.

The spelling of 668783412511 in words is "six hundred sixty-eight billion, seven hundred eighty-three million, four hundred twelve thousand, five hundred eleven".