26651 has 4 divisors (see below), whose sum is σ = 27600. Its totient is φ = 25704.

The previous prime is 26647. The next prime is 26669. The reversal of 26651 is 15662.

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 26651 - 2² = 26647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431 + ... + 488.

It is an arithmetic number, because the mean of its divisors is an integer number (6900).

2²⁶⁶⁵¹ is an apocalyptic number.

26651 is a deficient number, since it is larger than the sum of its proper divisors (949).

26651 is an equidigital number, since it uses as much as digits as its factorization.

26651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948.

The product of its digits is 360, while the sum is 20.

The square root of 26651 is about 163.2513399639. The cubic root of 26651 is about 29.8701797747.

The spelling of 26651 in words is "twenty-six thousand, six hundred fifty-one".