26505166 has 4 divisors (see below), whose sum is σ = 39757752. Its totient is φ = 13252582.

The previous prime is 26505161. The next prime is 26505173. The reversal of 26505166 is 66150562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66150562 = 2 ⋅33075281.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26505161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6626290 + ... + 6626293.

It is an arithmetic number, because the mean of its divisors is an integer number (9939438).

Almost surely, 2^26505166 is an apocalyptic number.

26505166 is a deficient number, since it is larger than the sum of its proper divisors (13252586).

26505166 is a wasteful number, since it uses less digits than its factorization.

26505166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13252585.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 26505166 is about 5148.3168123184. The cubic root of 26505166 is about 298.1559698821.

The spelling of 26505166 in words is "twenty-six million, five hundred five thousand, one hundred sixty-six".