26655691 has 4 divisors (see below), whose sum is σ = 27515584. Its totient is φ = 25795800.

The previous prime is 26655647. The next prime is 26655701. The reversal of 26655691 is 19655662.

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 26655691 - 2⁹ = 26655179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26655631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429900 + ... + 429961.

It is an arithmetic number, because the mean of its divisors is an integer number (6878896).

Almost surely, 2^26655691 is an apocalyptic number.

26655691 is a deficient number, since it is larger than the sum of its proper divisors (859893).

26655691 is an equidigital number, since it uses as much as digits as its factorization.

26655691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859892.

The product of its digits is 97200, while the sum is 40.

The square root of 26655691 is about 5162.9149712154. The cubic root of 26655691 is about 298.7193221418.

The spelling of 26655691 in words is "twenty-six million, six hundred fifty-five thousand, six hundred ninety-one".