866580930 has 40 divisors (see below), whose sum is σ = 2330142012. Its totient is φ = 231088032.

The previous prime is 866580919. The next prime is 866580931. The reversal of 866580930 is 39085668.

866580930 is a `hidden beast` number, since 8 + 66 + 580 + 9 + 3 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 740220849 + 126360081 = 27207^2 + 11241^2 .

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

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (866580931) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 534117 + ... + 535736.

Almost surely, 2^866580930 is an apocalyptic number.

866580930 is an abundant number, since it is smaller than the sum of its proper divisors (1463561082).

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

866580930 is a wasteful number, since it uses less digits than its factorization.

866580930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069872 (or 1069863 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 866580930 is about 29437.7466868645. The cubic root of 866580930 is about 953.3880613384.

The spelling of 866580930 in words is "eight hundred sixty-six million, five hundred eighty thousand, nine hundred thirty".