99663 has 8 divisors (see below), whose sum is σ = 134400. Its totient is φ = 65688.

The previous prime is 99661. The next prime is 99667. The reversal of 99663 is 36699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99663 - 2¹ = 99661 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99661) 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, 298 + ... + 536.

It is an arithmetic number, because the mean of its divisors is an integer number (16800).

2⁹⁹⁶⁶³ is an apocalyptic number.

99663 is a deficient number, since it is larger than the sum of its proper divisors (34737).

99663 is a wasteful number, since it uses less digits than its factorization.

99663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381.

The product of its digits is 8748, while the sum is 33.

The square root of 99663 is about 315.6944725522. The cubic root of 99663 is about 46.3636891405.

The spelling of 99663 in words is "ninety-nine thousand, six hundred sixty-three".