866683 has 2 divisors, whose sum is σ = 866684. Its totient is φ = 866682.

The previous prime is 866653. The next prime is 866689. The reversal of 866683 is 386668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866683 is a prime.

It is a super-2 number, since 2×866683² = 1502278844978, which contains 22 as substring.

866683 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (866689) 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 as a sum of consecutive naturals, namely, 433341 + 433342.

It is an arithmetic number, because the mean of its divisors is an integer number (433342).

2⁸⁶⁶⁶⁸³ is an apocalyptic number.

866683 is a deficient number, since it is larger than the sum of its proper divisors (1).

866683 is an equidigital number, since it uses as much as digits as its factorization.

866683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 866683 is about 930.9581086171. The cubic root of 866683 is about 95.3425491387.

The spelling of 866683 in words is "eight hundred sixty-six thousand, six hundred eighty-three".