866353320 has 576 divisors, whose sum is σ = 3630070080. Its totient is φ = 184633344.

The previous prime is 866353283. The next prime is 866353343. The reversal of 866353320 is 23353668.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8096707 + ... + 8096813.

It is an arithmetic number, because the mean of its divisors is an integer number (6302205).

Almost surely, 2^866353320 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 866353320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1815035040).

866353320 is an abundant number, since it is smaller than the sum of its proper divisors (2763716760).

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

866353320 is a wasteful number, since it uses less digits than its factorization.

866353320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 866353320 is about 29433.8804781157. The cubic root of 866353320 is about 953.3045839810.

The spelling of 866353320 in words is "eight hundred sixty-six million, three hundred fifty-three thousand, three hundred twenty".