668848146338144 has 24 divisors (see below), whose sum is σ = 1316795523039360. Its totient is φ = 334423886518656.

The previous prime is 668848146338111. The next prime is 668848146338249. The reversal of 668848146338144 is 441833641848866.

It is a congruent number.

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, 66012422 + ... + 75467450.

It is an arithmetic number, because the mean of its divisors is an integer number (54866480126640).

Almost surely, 2^{668848146338144} is an apocalyptic number.

It is an amenable number.

668848146338144 is a deficient number, since it is larger than the sum of its proper divisors (647947376701216).

668848146338144 is a wasteful number, since it uses less digits than its factorization.

668848146338144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11665662 (or 11665654 counting only the distinct ones).

The product of its digits is 2038431744, while the sum is 74.

The spelling of 668848146338144 in words is "six hundred sixty-eight trillion, eight hundred forty-eight billion, one hundred forty-six million, three hundred thirty-eight thousand, one hundred forty-four".