866427 has 8 divisors (see below), whose sum is σ = 1160016. Its totient is φ = 575232.

The previous prime is 866417. The next prime is 866431. The reversal of 866427 is 724668.

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

It is not a de Polignac number, because 866427 - 2¹¹ = 864379 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 6² + 4⁴ + 6⁵ + 2¹¹ + 7⁷ .

It is not an unprimeable number, because it can be changed into a prime (866417) 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, 583 + ... + 1439.

It is an arithmetic number, because the mean of its divisors is an integer number (145002).

2⁸⁶⁶⁴²⁷ is an apocalyptic number.

866427 is a deficient number, since it is larger than the sum of its proper divisors (293589).

866427 is a wasteful number, since it uses less digits than its factorization.

866427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its digits is 16128, while the sum is 33.

The square root of 866427 is about 930.8206057023. The cubic root of 866427 is about 95.3331608171. Note that the first 3 decimals are identical.

The spelling of 866427 in words is "eight hundred sixty-six thousand, four hundred twenty-seven".