65943680 has 256 divisors, whose sum is σ = 198288000. Its totient is φ = 20643840.

The previous prime is 65943677. The next prime is 65943707. The reversal of 65943680 is 8634956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2273906 + ... + 2273934.

Almost surely, 2^65943680 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 65943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99144000).

65943680 is an abundant number, since it is smaller than the sum of its proper divisors (132344320).

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

65943680 is a wasteful number, since it uses less digits than its factorization.

65943680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 65943680 is about 8120.5714084663. The cubic root of 65943680 is about 404.0090185223.

The spelling of 65943680 in words is "sixty-five million, nine hundred forty-three thousand, six hundred eighty".