1668822579900 has 720 divisors, whose sum is σ = 6301787548672. Its totient is φ = 374134464000.

The previous prime is 1668822579797. The next prime is 1668822579923. The reversal of 1668822579900 is 99752288661.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1029501090 + ... + 1029502710.

Almost surely, 2^{1668822579900} is an apocalyptic number.

1668822579900 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 1668822579900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3150893774336).

1668822579900 is an abundant number, since it is smaller than the sum of its proper divisors (4632964968772).

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

1668822579900 is a wasteful number, since it uses less digits than its factorization.

1668822579900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 1668822579900 in words is "one trillion, six hundred sixty-eight billion, eight hundred twenty-two million, five hundred seventy-nine thousand, nine hundred".