26646666 has 8 divisors (see below), whose sum is σ = 53293344. Its totient is φ = 8882220.

The previous prime is 26646661. The next prime is 26646677. The reversal of 26646666 is 66664662.

It is a happy number.

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

26646666 is an admirable number.

26646666 is a modest number, since divided by 6666 gives 2664 as remainder.

It is not an unprimeable number, because it can be changed into a prime (26646661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2220550 + ... + 2220561.

It is an arithmetic number, because the mean of its divisors is an integer number (6661668).

Almost surely, 2^26646666 is an apocalyptic number.

26646666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

26646666 is a wasteful number, since it uses less digits than its factorization.

26646666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441116.

The product of its digits is 373248, while the sum is 42.

The square root of 26646666 is about 5162.0408754678. The cubic root of 26646666 is about 298.6856051868.

The spelling of 26646666 in words is "twenty-six million, six hundred forty-six thousand, six hundred sixty-six".