1668877687000 has 128 divisors (see below), whose sum is σ = 3997669515840. Its totient is φ = 651752908800.

The previous prime is 1668877686923. The next prime is 1668877687033. The reversal of 1668877687000 is 7867788661.

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 31 ways as a sum of consecutive naturals, for example, 124564302 + ... + 124577698.

Almost surely, 2^{1668877687000} is an apocalyptic number.

1668877687000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668877687000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1998834757920).

1668877687000 is an abundant number, since it is smaller than the sum of its proper divisors (2328791828840).

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

1668877687000 is a wasteful number, since it uses less digits than its factorization.

1668877687000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16358 (or 16344 counting only the distinct ones).

The product of its (nonzero) digits is 37933056, while the sum is 64.

The spelling of 1668877687000 in words is "one trillion, six hundred sixty-eight billion, eight hundred seventy-seven million, six hundred eighty-seven thousand".