26880066 has 32 divisors (see below), whose sum is σ = 60499200. Its totient is φ = 8845200.

The previous prime is 26880023. The next prime is 26880067. The reversal of 26880066 is 66008862.

It is a self number, because there is not a number n which added to its sum of digits gives 26880066.

It is not an unprimeable number, because it can be changed into a prime (26880067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1116 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (1890600).

Almost surely, 2^26880066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26880066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30249600).

26880066 is an abundant number, since it is smaller than the sum of its proper divisors (33619134).

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

26880066 is a wasteful number, since it uses less digits than its factorization.

26880066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 26880066 is about 5184.5989237356. The cubic root of 26880066 is about 299.5551406600. Note that the first 3 decimals are identical.

The spelling of 26880066 in words is "twenty-six million, eight hundred eighty thousand, sixty-six".