866051 has 2 divisors, whose sum is σ = 866052. Its totient is φ = 866050.

The previous prime is 866029. The next prime is 866053. The reversal of 866051 is 150668.

866051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866051 - 2¹⁸ = 603907 is a prime.

Together with 866053, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 866051.

It is not a weakly prime, because it can be changed into another prime (866053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433025 + 433026.

It is an arithmetic number, because the mean of its divisors is an integer number (433026).

2⁸⁶⁶⁰⁵¹ is an apocalyptic number.

866051 is a deficient number, since it is larger than the sum of its proper divisors (1).

866051 is an equidigital number, since it uses as much as digits as its factorization.

866051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 866051 is about 930.6186114623. The cubic root of 866051 is about 95.3193683665.

The spelling of 866051 in words is "eight hundred sixty-six thousand, fifty-one".