668007642184 has 16 divisors (see below), whose sum is σ = 1254143097900. Its totient is φ = 333569482752.

The previous prime is 668007642119. The next prime is 668007642191. The reversal of 668007642184 is 481246700866.

It can be written as a sum of positive squares in 2 ways, for example, as 652363136100 + 15644506084 = 807690^2 + 125078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54285757 + ... + 54298060.

Almost surely, 2^668007642184 is an apocalyptic number.

It is an amenable number.

668007642184 is a deficient number, since it is larger than the sum of its proper divisors (586135455716).

668007642184 is a wasteful number, since it uses less digits than its factorization.

668007642184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108584592 (or 108584588 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 668007642184 in words is "six hundred sixty-eight billion, seven million, six hundred forty-two thousand, one hundred eighty-four".