866329387 has 12 divisors (see below), whose sum is σ = 1088282608. Its totient is φ = 675061200.

The previous prime is 866329337. The next prime is 866329417. The reversal of 866329387 is 783923668.

866329387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866329387 - 2¹⁹ = 865805099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866329307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510564 + ... + 512257.

Almost surely, 2^866329387 is an apocalyptic number.

866329387 is a deficient number, since it is larger than the sum of its proper divisors (221953221).

866329387 is a wasteful number, since it uses less digits than its factorization.

866329387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022850 (or 1022839 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 52.

The square root of 866329387 is about 29433.4739200115. The cubic root of 866329387 is about 953.2958055576.

The spelling of 866329387 in words is "eight hundred sixty-six million, three hundred twenty-nine thousand, three hundred eighty-seven".