825663 has 8 divisors (see below), whose sum is σ = 1108528. Its totient is φ = 546624.

The previous prime is 825661. The next prime is 825679. The reversal of 825663 is 366528.

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

It is not a de Polignac number, because 825663 - 2¹ = 825661 is a prime.

It is a Duffinian number.

825663 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 825663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825661) 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, 406 + ... + 1347.

It is an arithmetic number, because the mean of its divisors is an integer number (138566).

2⁸²⁵⁶⁶³ is an apocalyptic number.

825663 is a deficient number, since it is larger than the sum of its proper divisors (282865).

825663 is a wasteful number, since it uses less digits than its factorization.

825663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913.

The product of its digits is 8640, while the sum is 30.

The square root of 825663 is about 908.6600024211. The cubic root of 825663 is about 93.8139900907.

The spelling of 825663 in words is "eight hundred twenty-five thousand, six hundred sixty-three".