263220663 has 4 divisors (see below), whose sum is σ = 350960888. Its totient is φ = 175480440.

The previous prime is 263220649. The next prime is 263220677. The reversal of 263220663 is 366022362.

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

It is an interprime number because it is at equal distance from previous prime (263220649) and next prime (263220677).

It is not a de Polignac number, because 263220663 - 2⁴ = 263220647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263220663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263220613) 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, 43870108 + ... + 43870113.

It is an arithmetic number, because the mean of its divisors is an integer number (87740222).

Almost surely, 2^263220663 is an apocalyptic number.

263220663 is a deficient number, since it is larger than the sum of its proper divisors (87740225).

263220663 is an equidigital number, since it uses as much as digits as its factorization.

263220663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87740224.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 263220663 is about 16224.0766455290. The cubic root of 263220663 is about 640.8749937752.

The spelling of 263220663 in words is "two hundred sixty-three million, two hundred twenty thousand, six hundred sixty-three".