845866 has 16 divisors (see below), whose sum is σ = 1497600. Its totient is φ = 350640.

The previous prime is 845863. The next prime is 845879. The reversal of 845866 is 668548.

It is not an unprimeable number, because it can be changed into a prime (845863) 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, 541 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (93600).

2⁸⁴⁵⁸⁶⁶ is an apocalyptic number.

845866 is a deficient number, since it is larger than the sum of its proper divisors (651734).

845866 is a wasteful number, since it uses less digits than its factorization.

845866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989.

The product of its digits is 46080, while the sum is 37.

The square root of 845866 is about 919.7097368192. The cubic root of 845866 is about 94.5730051837.

It can be divided in two parts, 845 and 866, that added together give a triangular number (1711 = T₅₈).

The spelling of 845866 in words is "eight hundred forty-five thousand, eight hundred sixty-six".