866860729 has 8 divisors (see below), whose sum is σ = 990901440. Its totient is φ = 742870896.

The previous prime is 866860727. The next prime is 866860741. The reversal of 866860729 is 927068668.

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

It is a cyclic number.

It is not a de Polignac number, because 866860729 - 2¹ = 866860727 is a prime.

It is a super-2 number, since 2×866860729² = 1502895046964822882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866860727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36507 + ... + 55375.

It is an arithmetic number, because the mean of its divisors is an integer number (123862680).

Almost surely, 2^866860729 is an apocalyptic number.

It is an amenable number.

866860729 is a deficient number, since it is larger than the sum of its proper divisors (124040711).

866860729 is a wasteful number, since it uses less digits than its factorization.

866860729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25439.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 866860729 is about 29442.4986881209. The cubic root of 866860729 is about 953.4906593040.

The spelling of 866860729 in words is "eight hundred sixty-six million, eight hundred sixty thousand, seven hundred twenty-nine".