26631 has 12 divisors (see below), whose sum is σ = 42120. Its totient is φ = 16080.

The previous prime is 26627. The next prime is 26633. The reversal of 26631 is 13662.

It is a happy number.

26631 is a `hidden beast` number, since 2 + 663 + 1 = 666.

It is not a de Polignac number, because 26631 - 2² = 26627 is a prime.

It is a super-2 number, since 2×26631² = 1418420322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36 + ... + 233.

It is an arithmetic number, because the mean of its divisors is an integer number (3510).

2²⁶⁶³¹ is an apocalyptic number.

26631 is a deficient number, since it is larger than the sum of its proper divisors (15489).

26631 is a wasteful number, since it uses less digits than its factorization.

26631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 283 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 26631 is about 163.1900732275. The cubic root of 26631 is about 29.8627059701.

The spelling of 26631 in words is "twenty-six thousand, six hundred thirty-one".