26680591 has 8 divisors (see below), whose sum is σ = 30878720. Its totient is φ = 22579128.

The previous prime is 26680559. The next prime is 26680601. The reversal of 26680591 is 19508662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26680591 - 2⁵ = 26680559 is a prime.

It is a super-2 number, since 2×26680591² = 1423707872218562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26680591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26680691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23571 + ... + 24676.

It is an arithmetic number, because the mean of its divisors is an integer number (3859840).

Almost surely, 2^26680591 is an apocalyptic number.

26680591 is a deficient number, since it is larger than the sum of its proper divisors (4198129).

26680591 is an equidigital number, since it uses as much as digits as its factorization.

26680591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48333.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 26680591 is about 5165.3258367696. The cubic root of 26680591 is about 298.8123078668.

The spelling of 26680591 in words is "twenty-six million, six hundred eighty thousand, five hundred ninety-one".