66338880 has 112 divisors (see below), whose sum is σ = 221772480. Its totient is φ = 16754688.

The previous prime is 66338843. The next prime is 66338917. The reversal of 66338880 is 8883366.

It is an interprime number because it is at equal distance from previous prime (66338843) and next prime (66338917).

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, 16422 + ... + 20058.

Almost surely, 2^66338880 is an apocalyptic number.

66338880 is a gapful number since it is divisible by the number (60) 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 66338880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110886240).

66338880 is an abundant number, since it is smaller than the sum of its proper divisors (155433600).

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

66338880 is a wasteful number, since it uses less digits than its factorization.

66338880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676 (or 3666 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 66338880 is about 8144.8683230608. The cubic root of 66338880 is about 404.8144859861.

The spelling of 66338880 in words is "sixty-six million, three hundred thirty-eight thousand, eight hundred eighty".