866057276 has 48 divisors (see below), whose sum is σ = 1818700800. Its totient is φ = 352997568.

The previous prime is 866057273. The next prime is 866057293. The reversal of 866057276 is 672750668.

It is a self number, because there is not a number n which added to its sum of digits gives 866057276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866057273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46445 + ... + 62363.

It is an arithmetic number, because the mean of its divisors is an integer number (37889600).

Almost surely, 2^866057276 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 866057276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909350400).

866057276 is an abundant number, since it is smaller than the sum of its proper divisors (952643524).

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

866057276 is a wasteful number, since it uses less digits than its factorization.

866057276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16026 (or 16024 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 866057276 is about 29428.8510818890. The cubic root of 866057276 is about 953.1959861576.

The spelling of 866057276 in words is "eight hundred sixty-six million, fifty-seven thousand, two hundred seventy-six".