26601661 has 8 divisors (see below), whose sum is σ = 27365184. Its totient is φ = 25843680.

The previous prime is 26601647. The next prime is 26601667. The reversal of 26601661 is 16610662.

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

It is a cyclic number.

It is not a de Polignac number, because 26601661 - 2²³ = 18213053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26601667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9550 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (3420648).

Almost surely, 2^26601661 is an apocalyptic number.

It is an amenable number.

26601661 is a deficient number, since it is larger than the sum of its proper divisors (763523).

26601661 is a wasteful number, since it uses less digits than its factorization.

26601661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 26601661 is about 5157.6798078206. The cubic root of 26601661 is about 298.5173549874.

Subtracting from 26601661 its reverse (16610662), we obtain a palindrome (9990999).

The spelling of 26601661 in words is "twenty-six million, six hundred one thousand, six hundred sixty-one".