26616660 has 96 divisors (see below), whose sum is σ = 86016000. Its totient is φ = 6023808.

The previous prime is 26616649. The next prime is 26616671. The reversal of 26616660 is 6661662.

It is an interprime number because it is at equal distance from previous prime (26616649) and next prime (26616671).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 53091 + ... + 53589.

It is an arithmetic number, because the mean of its divisors is an integer number (896000).

Almost surely, 2^26616660 is an apocalyptic number.

26616660 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 26616660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43008000).

26616660 is an abundant number, since it is smaller than the sum of its proper divisors (59399340).

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

26616660 is a wasteful number, since it uses less digits than its factorization.

26616660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 26616660 is about 5159.1336482010. The cubic root of 26616660 is about 298.5734494865.

The spelling of 26616660 in words is "twenty-six million, six hundred sixteen thousand, six hundred sixty".