26660220 has 48 divisors (see below), whose sum is σ = 77898240. Its totient is φ = 6799936.

The previous prime is 26660213. The next prime is 26660237. The reversal of 26660220 is 2206662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8280 + ... + 11039.

It is an arithmetic number, because the mean of its divisors is an integer number (1622880).

Almost surely, 2^26660220 is an apocalyptic number.

26660220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26660220 is an abundant number, since it is smaller than the sum of its proper divisors (51238020).

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

26660220 is a wasteful number, since it uses less digits than its factorization.

26660220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19354 (or 19352 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 26660220 is about 5163.3535613979. The cubic root of 26660220 is about 298.7362393947.

Adding to 26660220 its reverse (2206662), we get a palindrome (28866882).

The spelling of 26660220 in words is "twenty-six million, six hundred sixty thousand, two hundred twenty".