866486787 has 8 divisors (see below), whose sum is σ = 1223275536. Its totient is φ = 543677952.

The previous prime is 866486759. The next prime is 866486857. The reversal of 866486787 is 787684668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866486787 - 2¹² = 866482691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866486787.

It is not an unprimeable number, because it can be changed into a prime (866486587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8494918 + ... + 8495019.

It is an arithmetic number, because the mean of its divisors is an integer number (152909442).

Almost surely, 2^866486787 is an apocalyptic number.

866486787 is a deficient number, since it is larger than the sum of its proper divisors (356788749).

866486787 is a wasteful number, since it uses less digits than its factorization.

866486787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16989957.

The product of its digits is 21676032, while the sum is 60.

The square root of 866486787 is about 29436.1476249865. The cubic root of 866486787 is about 953.3535355910.

The spelling of 866486787 in words is "eight hundred sixty-six million, four hundred eighty-six thousand, seven hundred eighty-seven".