26660945 has 4 divisors (see below), whose sum is σ = 31993140. Its totient is φ = 21328752.

The previous prime is 26660939. The next prime is 26660951. The reversal of 26660945 is 54906662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54906662 = 2 ⋅27453331.

It is an interprime number because it is at equal distance from previous prime (26660939) and next prime (26660951).

It can be written as a sum of positive squares in 2 ways, for example, as 4231249 + 22429696 = 2057^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 26660945 - 2¹⁴ = 26644561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26660899 and 26660908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666090 + ... + 2666099.

It is an arithmetic number, because the mean of its divisors is an integer number (7998285).

Almost surely, 2^26660945 is an apocalyptic number.

It is an amenable number.

26660945 is a deficient number, since it is larger than the sum of its proper divisors (5332195).

26660945 is an equidigital number, since it uses as much as digits as its factorization.

26660945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332194.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 26660945 is about 5163.4237672304. The cubic root of 26660945 is about 298.7389473219.

The spelling of 26660945 in words is "twenty-six million, six hundred sixty thousand, nine hundred forty-five".