99566 has 4 divisors (see below), whose sum is σ = 149352. Its totient is φ = 49782.

The previous prime is 99563. The next prime is 99571. The reversal of 99566 is 66599.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24890 + ... + 24893.

It is an arithmetic number, because the mean of its divisors is an integer number (37338).

2⁹⁹⁵⁶⁶ is an apocalyptic number.

99566 is a deficient number, since it is larger than the sum of its proper divisors (49786).

99566 is a wasteful number, since it uses less digits than its factorization.

99566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49785.

The product of its digits is 14580, while the sum is 35.

The square root of 99566 is about 315.5408056021. The cubic root of 99566 is about 46.3486426415.

The spelling of 99566 in words is "ninety-nine thousand, five hundred sixty-six".