1668666683516 has 12 divisors (see below), whose sum is σ = 3337333367088. Its totient is φ = 715142864352.

The previous prime is 1668666683483. The next prime is 1668666683521. The reversal of 1668666683516 is 6153866668661.

1668666683516 is an admirable number.

It is a super-2 number, since 2×1668666683516² (a number of 25 digits) contains 22 as substring.

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, 29797619321 + ... + 29797619376.

It is an arithmetic number, because the mean of its divisors is an integer number (278111113924).

Almost surely, 2^{1668666683516} is an apocalyptic number.

It is an amenable number.

1668666683516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1668666683516 is a wasteful number, since it uses less digits than its factorization.

1668666683516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59595238708 (or 59595238706 counting only the distinct ones).

The product of its digits is 268738560, while the sum is 68.

The spelling of 1668666683516 in words is "one trillion, six hundred sixty-eight billion, six hundred sixty-six million, six hundred eighty-three thousand, five hundred sixteen".