668009954645 has 8 divisors (see below), whose sum is σ = 874485758880. Its totient is φ = 485825421520.

The previous prime is 668009954629. The next prime is 668009954659. The reversal of 668009954645 is 546459900866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668009954645 - 2⁴ = 668009954629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6072817715 + ... + 6072817824.

It is an arithmetic number, because the mean of its divisors is an integer number (109310719860).

Almost surely, 2^668009954645 is an apocalyptic number.

It is an amenable number.

668009954645 is a deficient number, since it is larger than the sum of its proper divisors (206475804235).

668009954645 is a wasteful number, since it uses less digits than its factorization.

668009954645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12145635555.

The product of its (nonzero) digits is 55987200, while the sum is 62.

The spelling of 668009954645 in words is "six hundred sixty-eight billion, nine million, nine hundred fifty-four thousand, six hundred forty-five".