26664445 has 4 divisors (see below), whose sum is σ = 31997340. Its totient is φ = 21331552.

The previous prime is 26664439. The next prime is 26664479. The reversal of 26664445 is 54446662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54446662 = 2 ⋅27223331.

It can be written as a sum of positive squares in 2 ways, for example, as 16760836 + 9903609 = 4094^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 26664445 - 2⁵ = 26664413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666440 + ... + 2666449.

It is an arithmetic number, because the mean of its divisors is an integer number (7999335).

Almost surely, 2^26664445 is an apocalyptic number.

It is an amenable number.

26664445 is a deficient number, since it is larger than the sum of its proper divisors (5332895).

26664445 is an equidigital number, since it uses as much as digits as its factorization.

26664445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332894.

The product of its digits is 138240, while the sum is 37.

The square root of 26664445 is about 5163.7626785126. The cubic root of 26664445 is about 298.7520193838.

The spelling of 26664445 in words is "twenty-six million, six hundred sixty-four thousand, four hundred forty-five".