26601330 has 128 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 5612544.

The previous prime is 26601329. The next prime is 26601331. The reversal of 26601330 is 3310662.

It is an interprime number because it is at equal distance from previous prime (26601329) and next prime (26601331).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26601297 and 26601306.

It is not an unprimeable number, because it can be changed into a prime (26601331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 235354 + ... + 235466.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

Almost surely, 2^26601330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26601330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39398400).

26601330 is an abundant number, since it is smaller than the sum of its proper divisors (52195470).

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

26601330 is a wasteful number, since it uses less digits than its factorization.

26601330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 26601330 is about 5157.6477196489. The cubic root of 26601330 is about 298.5161168485.

Adding to 26601330 its reverse (3310662), we get a palindrome (29911992).

The spelling of 26601330 in words is "twenty-six million, six hundred one thousand, three hundred thirty".