1688666668700 has 36 divisors (see below), whose sum is σ = 3997534552872. Its totient is φ = 614060606400.

The previous prime is 1688666668693. The next prime is 1688666668771. The reversal of 1688666668700 is 78666668861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 767574659 + ... + 767576858.

Almost surely, 2^{1688666668700} is an apocalyptic number.

1688666668700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1688666668700 is an abundant number, since it is smaller than the sum of its proper divisors (2308867884172).

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

1688666668700 is a wasteful number, since it uses less digits than its factorization.

1688666668700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535151542 (or 1535151535 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 68.

The spelling of 1688666668700 in words is "one trillion, six hundred eighty-eight billion, six hundred sixty-six million, six hundred sixty-eight thousand, seven hundred".