84566 has 4 divisors (see below), whose sum is σ = 126852. Its totient is φ = 42282.

The previous prime is 84559. The next prime is 84589. The reversal of 84566 is 66548.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

84566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21140 + ... + 21143.

It is an arithmetic number, because the mean of its divisors is an integer number (31713).

2⁸⁴⁵⁶⁶ is an apocalyptic number.

84566 is a deficient number, since it is larger than the sum of its proper divisors (42286).

84566 is a wasteful number, since it uses less digits than its factorization.

84566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42285.

The product of its digits is 5760, while the sum is 29.

The square root of 84566 is about 290.8023383675. The cubic root of 84566 is about 43.8933366806.

The spelling of 84566 in words is "eighty-four thousand, five hundred sixty-six".