668009954643 has 16 divisors (see below), whose sum is σ = 927361290912. Its totient is φ = 427355424000.

The previous prime is 668009954629. The next prime is 668009954659. The reversal of 668009954643 is 346459900866.

It is not a de Polignac number, because 668009954643 - 2⁸ = 668009954387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668009956643) 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, 44508688 + ... + 44523693.

It is an arithmetic number, because the mean of its divisors is an integer number (57960080682).

Almost surely, 2^668009954643 is an apocalyptic number.

668009954643 is a deficient number, since it is larger than the sum of its proper divisors (259351336269).

668009954643 is a wasteful number, since it uses less digits than its factorization.

668009954643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89032486.

The product of its (nonzero) digits is 33592320, while the sum is 60.

The spelling of 668009954643 in words is "six hundred sixty-eight billion, nine million, nine hundred fifty-four thousand, six hundred forty-three".