8921000666700 has 576 divisors, whose sum is σ = 30802609756800. Its totient is φ = 2234531266560.

The previous prime is 8921000666693. The next prime is 8921000666759. The reversal of 8921000666700 is 76660001298.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2115482992 + ... + 2115487208.

It is an arithmetic number, because the mean of its divisors is an integer number (53476753050).

Almost surely, 2^{8921000666700} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8921000666700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15401304878400).

8921000666700 is an abundant number, since it is smaller than the sum of its proper divisors (21881609090100).

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

8921000666700 is a wasteful number, since it uses less digits than its factorization.

8921000666700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838 (or 4813 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

Adding to 8921000666700 its reverse (76660001298), we get a palindrome (8997660667998).

The spelling of 8921000666700 in words is "eight trillion, nine hundred twenty-one billion, six hundred sixty-six thousand, seven hundred".