26650 has 24 divisors (see below), whose sum is σ = 54684. Its totient is φ = 9600.

The previous prime is 26647. The next prime is 26669. The reversal of 26650 is 5662.

It can be written as a sum of positive squares in 6 ways, for example, as 729 + 25921 = 27^2 + 161^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 630 + ... + 670.

2²⁶⁶⁵⁰ is an apocalyptic number.

26650 is the 82-nd decagonal number.

26650 is an abundant number, since it is smaller than the sum of its proper divisors (28034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27342).

26650 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (26649) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (66).

26650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 26650 is about 163.2482771731. The cubic root of 26650 is about 29.8698061733.

It can be divided in two parts, 26 and 650, that multiplied together give a square (16900 = 130²).

The spelling of 26650 in words is "twenty-six thousand, six hundred fifty".