6668140007408 has 40 divisors (see below), whose sum is σ = 14835813899520. Its totient is φ = 2871447848640.

The previous prime is 6668140007377. The next prime is 6668140007443. The reversal of 6668140007408 is 8047000418666.

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, 997027160 + ... + 997033847.

It is an arithmetic number, because the mean of its divisors is an integer number (370895347488).

Almost surely, 2^{6668140007408} is an apocalyptic number.

It is an amenable number.

6668140007408 is an abundant number, since it is smaller than the sum of its proper divisors (8167673892112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6668140007408 is a wasteful number, since it uses less digits than its factorization.

6668140007408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994061045 (or 1994061039 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 6668140007408 in words is "six trillion, six hundred sixty-eight billion, one hundred forty million, seven thousand, four hundred eight".