26664768 has 112 divisors (see below), whose sum is σ = 84490560. Its totient is φ = 8197632.

The previous prime is 26664767. The next prime is 26664769. The reversal of 26664768 is 86746662.

It is an interprime number because it is at equal distance from previous prime (26664767) and next prime (26664769).

It is a super-2 number, since 2×26664768² = 1422019704987648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664761) 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, 21871 + ... + 23057.

It is an arithmetic number, because the mean of its divisors is an integer number (754380).

Almost surely, 2^26664768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26664768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42245280).

26664768 is an abundant number, since it is smaller than the sum of its proper divisors (57825792).

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

26664768 is a wasteful number, since it uses less digits than its factorization.

26664768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1205 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 26664768 is about 5163.7939540613. The cubic root of 26664768 is about 298.7532256907.

The spelling of 26664768 in words is "twenty-six million, six hundred sixty-four thousand, seven hundred sixty-eight".