1686666668352 has 28 divisors (see below), whose sum is σ = 4462638893856. Its totient is φ = 562222222720.

The previous prime is 1686666668327. The next prime is 1686666668369. The reversal of 1686666668352 is 2538666666861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4392360924 + ... + 4392361307.

Almost surely, 2^{1686666668352} is an apocalyptic number.

1686666668352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1686666668352 is an abundant number, since it is smaller than the sum of its proper divisors (2775972225504).

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

1686666668352 is an equidigital number, since it uses as much as digits as its factorization.

1686666668352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784722246 (or 8784722236 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 69.

The spelling of 1686666668352 in words is "one trillion, six hundred eighty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, three hundred fifty-two".