866059 has 8 divisors (see below), whose sum is σ = 902880. Its totient is φ = 830016.

The previous prime is 866057. The next prime is 866081. The reversal of 866059 is 950668.

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 866059 - 2¹ = 866057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3162 + ... + 3424.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2⁸⁶⁶⁰⁵⁹ is an apocalyptic number.

866059 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

866059 is a deficient number, since it is larger than the sum of its proper divisors (36821).

866059 is a wasteful number, since it uses less digits than its factorization.

866059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 866059 is about 930.6229096686. The cubic root of 866059 is about 95.3196618644.

The spelling of 866059 in words is "eight hundred sixty-six thousand, fifty-nine".