26662989 has 4 divisors (see below), whose sum is σ = 35550656. Its totient is φ = 17775324.

The previous prime is 26662981. The next prime is 26662991. The reversal of 26662989 is 98926662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26662989 - 2³ = 26662981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26662981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4443829 + ... + 4443834.

It is an arithmetic number, because the mean of its divisors is an integer number (8887664).

Almost surely, 2^26662989 is an apocalyptic number.

It is an amenable number.

26662989 is a deficient number, since it is larger than the sum of its proper divisors (8887667).

26662989 is an equidigital number, since it uses as much as digits as its factorization.

26662989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8887666.

The product of its digits is 559872, while the sum is 48.

The square root of 26662989 is about 5163.6216941213. The cubic root of 26662989 is about 298.7465815450.

The spelling of 26662989 in words is "twenty-six million, six hundred sixty-two thousand, nine hundred eighty-nine".