26666660 has 48 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 9846144.

The previous prime is 26666621. The next prime is 26666663. The reversal of 26666660 is 6666662.

It is a super-2 number, since 2×26666660² = 1422221511111200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26666663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12341 + ... + 14339.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^26666660 is an apocalyptic number.

26666660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26666660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240000).

26666660 is an abundant number, since it is smaller than the sum of its proper divisors (33813340).

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

26666660 is a wasteful number, since it uses less digits than its factorization.

26666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 26666660 is about 5163.9771494460. The cubic root of 26666660 is about 298.7602915404.

The spelling of 26666660 in words is "twenty-six million, six hundred sixty-six thousand, six hundred sixty".