240663 has 4 divisors (see below), whose sum is σ = 320888. Its totient is φ = 160440.

The previous prime is 240659. The next prime is 240677. The reversal of 240663 is 366042.

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

It is not a de Polignac number, because 240663 - 2² = 240659 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 240663.

It is not an unprimeable number, because it can be changed into a prime (240623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40108 + ... + 40113.

It is an arithmetic number, because the mean of its divisors is an integer number (80222).

2²⁴⁰⁶⁶³ is an apocalyptic number.

240663 is a deficient number, since it is larger than the sum of its proper divisors (80225).

240663 is an equidigital number, since it uses as much as digits as its factorization.

240663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80224.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 240663 is about 490.5741534162. The cubic root of 240663 is about 62.2018223706.

It can be divided in two parts, 240 and 663, that added together give a triangular number (903 = T₄₂).

The spelling of 240663 in words is "two hundred forty thousand, six hundred sixty-three".