866545472 has 84 divisors (see below), whose sum is σ = 1881126540. Its totient is φ = 395845632.

The previous prime is 866545451. The next prime is 866545499. The reversal of 866545472 is 274545668.

866545472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 550559296 + 315986176 = 23464^2 + 17776^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1221854 + ... + 1222562.

Almost surely, 2^866545472 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 866545472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940563270).

866545472 is an abundant number, since it is smaller than the sum of its proper divisors (1014581068).

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

866545472 is a wasteful number, since it uses less digits than its factorization.

866545472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 837 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 47.

The square root of 866545472 is about 29437.1444267273. The cubic root of 866545472 is about 953.3750578616.

The spelling of 866545472 in words is "eight hundred sixty-six million, five hundred forty-five thousand, four hundred seventy-two".