26561166 has 8 divisors (see below), whose sum is σ = 53122344. Its totient is φ = 8853720.

The previous prime is 26561137. The next prime is 26561173. The reversal of 26561166 is 66116562.

It is a sphenic number, since it is the product of 3 distinct primes.

26561166 is an admirable number.

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, 2213425 + ... + 2213436.

It is an arithmetic number, because the mean of its divisors is an integer number (6640293).

Almost surely, 2^26561166 is an apocalyptic number.

26561166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26561166 is a wasteful number, since it uses less digits than its factorization.

26561166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426866.

The product of its digits is 12960, while the sum is 33.

The square root of 26561166 is about 5153.7526133876. The cubic root of 26561166 is about 298.3658030540.

The spelling of 26561166 in words is "twenty-six million, five hundred sixty-one thousand, one hundred sixty-six".