1668686703668 has 24 divisors (see below), whose sum is σ = 2928400618080. Its totient is φ = 832001556960.

The previous prime is 1668686703667. The next prime is 1668686703679. The reversal of 1668686703668 is 8663076868661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668686703667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9204830 + ... + 9384362.

It is an arithmetic number, because the mean of its divisors is an integer number (122016692420).

Almost surely, 2^{1668686703668} is an apocalyptic number.

It is an amenable number.

1668686703668 is a deficient number, since it is larger than the sum of its proper divisors (1259713914412).

1668686703668 is a wasteful number, since it uses less digits than its factorization.

1668686703668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186047 (or 186045 counting only the distinct ones).

The product of its (nonzero) digits is 501645312, while the sum is 71.

The spelling of 1668686703668 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, six hundred sixty-eight".