26116663 has 4 divisors (see below), whose sum is σ = 26959168. Its totient is φ = 25274160.

The previous prime is 26116639. The next prime is 26116691. The reversal of 26116663 is 36661162.

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 26116663 - 2⁹ = 26116151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 842473 = 26116663 / (2 + 6 + 1 + 1 + 6 + 6 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26116613) 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, 421206 + ... + 421267.

It is an arithmetic number, because the mean of its divisors is an integer number (6739792).

Almost surely, 2^26116663 is an apocalyptic number.

26116663 is a deficient number, since it is larger than the sum of its proper divisors (842505).

26116663 is an equidigital number, since it uses as much as digits as its factorization.

26116663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842504.

The product of its digits is 7776, while the sum is 31.

The square root of 26116663 is about 5110.4464579917. The cubic root of 26116663 is about 296.6920402206.

The spelling of 26116663 in words is "twenty-six million, one hundred sixteen thousand, six hundred sixty-three".