25667 has 2 divisors, whose sum is σ = 25668. Its totient is φ = 25666.

The previous prime is 25657. The next prime is 25673. The reversal of 25667 is 76652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25667 - 2⁶ = 25603 is a prime.

It is a plaindrome in base 7 and base 10.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (25657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12833 + 12834.

It is an arithmetic number, because the mean of its divisors is an integer number (12834).

2²⁵⁶⁶⁷ is an apocalyptic number.

25667 is a deficient number, since it is larger than the sum of its proper divisors (1).

25667 is an equidigital number, since it uses as much as digits as its factorization.

25667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 25667 is about 160.2092381856. The cubic root of 25667 is about 29.4979410609.

It can be divided in two parts, 256 and 67, that added together give a palindrome (323).

The spelling of 25667 in words is "twenty-five thousand, six hundred sixty-seven".