1666352960800 has 216 divisors, whose sum is σ = 4714210927440. Its totient is φ = 570301747200.

The previous prime is 1666352960731. The next prime is 1666352960807. The reversal of 1666352960800 is 80692536661.

It is not an unprimeable number, because it can be changed into a prime (1666352960807) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 2215591 + ... + 2870809.

It is an arithmetic number, because the mean of its divisors is an integer number (21825050590).

Almost surely, 2^{1666352960800} is an apocalyptic number.

1666352960800 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 1666352960800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357105463720).

1666352960800 is an abundant number, since it is smaller than the sum of its proper divisors (3047857966640).

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

1666352960800 is a wasteful number, since it uses less digits than its factorization.

1666352960800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655284 (or 655254 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 1666352960800 in words is "one trillion, six hundred sixty-six billion, three hundred fifty-two million, nine hundred sixty thousand, eight hundred".