825667 has 4 divisors (see below), whose sum is σ = 828360. Its totient is φ = 822976.

The previous prime is 825661. The next prime is 825679. The reversal of 825667 is 766528.

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

It is a cyclic number.

It is not a de Polignac number, because 825667 - 2¹¹ = 823619 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

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 3 ways as a sum of consecutive naturals, for example, 817 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (207090).

2⁸²⁵⁶⁶⁷ is an apocalyptic number.

825667 is a deficient number, since it is larger than the sum of its proper divisors (2693).

825667 is a wasteful number, since it uses less digits than its factorization.

825667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692.

The product of its digits is 20160, while the sum is 34.

The square root of 825667 is about 908.6622034618. The cubic root of 825667 is about 93.8141415873.

The spelling of 825667 in words is "eight hundred twenty-five thousand, six hundred sixty-seven".