866693 has 2 divisors, whose sum is σ = 866694. Its totient is φ = 866692.

The previous prime is 866689. The next prime is 866707. The reversal of 866693 is 396668.

It is a happy number.

866693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 833569 + 33124 = 913^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 866693 - 2² = 866689 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866693.

It is not a weakly prime, because it can be changed into another prime (866623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433346 + 433347.

It is an arithmetic number, because the mean of its divisors is an integer number (433347).

2⁸⁶⁶⁶⁹³ is an apocalyptic number.

It is an amenable number.

866693 is a deficient number, since it is larger than the sum of its proper divisors (1).

866693 is an equidigital number, since it uses as much as digits as its factorization.

866693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 866693 is about 930.9634794126. The cubic root of 866693 is about 95.3429158325.

The spelling of 866693 in words is "eight hundred sixty-six thousand, six hundred ninety-three".