668466210683 has 2 divisors, whose sum is σ = 668466210684. Its totient is φ = 668466210682.

The previous prime is 668466210593. The next prime is 668466210697. The reversal of 668466210683 is 386012664866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668466210683 - 2¹⁰ = 668466209659 is a prime.

It is not a weakly prime, because it can be changed into another prime (668466210883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334233105341 + 334233105342.

It is an arithmetic number, because the mean of its divisors is an integer number (334233105342).

Almost surely, 2^668466210683 is an apocalyptic number.

668466210683 is a deficient number, since it is larger than the sum of its proper divisors (1).

668466210683 is an equidigital number, since it uses as much as digits as its factorization.

668466210683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 668466210683 in words is "six hundred sixty-eight billion, four hundred sixty-six million, two hundred ten thousand, six hundred eighty-three".