866607816 has 32 divisors (see below), whose sum is σ = 2219364000. Its totient is φ = 281823360.

The previous prime is 866607799. The next prime is 866607817. The reversal of 866607816 is 618706668.

866607816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866607817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439366 + ... + 441333.

It is an arithmetic number, because the mean of its divisors is an integer number (69355125).

Almost surely, 2^866607816 is an apocalyptic number.

It is an amenable number.

866607816 is an abundant number, since it is smaller than the sum of its proper divisors (1352756184).

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

866607816 is a wasteful number, since it uses less digits than its factorization.

866607816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880749 (or 880745 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 866607816 is about 29438.2033419161. The cubic root of 866607816 is about 953.3979209777.

The spelling of 866607816 in words is "eight hundred sixty-six million, six hundred seven thousand, eight hundred sixteen".