668466210641 has 16 divisors (see below), whose sum is σ = 710373758400. Its totient is φ = 627233660928.

The previous prime is 668466210593. The next prime is 668466210683. The reversal of 668466210641 is 146012664866.

It is a cyclic number.

It is not a de Polignac number, because 668466210641 - 2²² = 668462016337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668466210641.

It is not an unprimeable number, because it can be changed into a prime (668466210241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10444145 + ... + 10507953.

It is an arithmetic number, because the mean of its divisors is an integer number (44398359900).

Almost surely, 2^668466210641 is an apocalyptic number.

It is an amenable number.

668466210641 is a deficient number, since it is larger than the sum of its proper divisors (41907547759).

668466210641 is a wasteful number, since it uses less digits than its factorization.

668466210641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69088.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 668466210641 in words is "six hundred sixty-eight billion, four hundred sixty-six million, two hundred ten thousand, six hundred forty-one".