866215073 has 8 divisors (see below), whose sum is σ = 916533600. Its totient is φ = 816369408.

The previous prime is 866214971. The next prime is 866215081. The reversal of 866215073 is 370512668.

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 866215073 - 2¹⁴ = 866198689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866215573) 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, 114443 + ... + 121776.

It is an arithmetic number, because the mean of its divisors is an integer number (114566700).

Almost surely, 2^866215073 is an apocalyptic number.

It is an amenable number.

866215073 is a deficient number, since it is larger than the sum of its proper divisors (50318527).

866215073 is a wasteful number, since it uses less digits than its factorization.

866215073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236431.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 866215073 is about 29431.5319512933. The cubic root of 866215073 is about 953.2538739121.

The spelling of 866215073 in words is "eight hundred sixty-six million, two hundred fifteen thousand, seventy-three".