866533080 has 256 divisors, whose sum is σ = 3105423360. Its totient is φ = 189273600.

The previous prime is 866533037. The next prime is 866533097. The reversal of 866533080 is 80335668.

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 63 ways as a sum of consecutive naturals, for example, 2786125 + ... + 2786435.

It is an arithmetic number, because the mean of its divisors is an integer number (12130560).

Almost surely, 2^866533080 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 866533080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552711680).

866533080 is an abundant number, since it is smaller than the sum of its proper divisors (2238890280).

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

866533080 is a wasteful number, since it uses less digits than its factorization.

866533080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 866533080 is about 29436.9339436022. The cubic root of 866533080 is about 953.3705132722.

The spelling of 866533080 in words is "eight hundred sixty-six million, five hundred thirty-three thousand, eighty".