65920320 has 168 divisors, whose sum is σ = 232038144. Its totient is φ = 17169408.

The previous prime is 65920313. The next prime is 65920331. The reversal of 65920320 is 2302956.

65920320 is a `hidden beast` number, since 659 + 2 + 0 + 3 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135117 + ... + 135603.

Almost surely, 2^65920320 is an apocalyptic number.

65920320 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 65920320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116019072).

65920320 is an abundant number, since it is smaller than the sum of its proper divisors (166117824).

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

65920320 is a wasteful number, since it uses less digits than its factorization.

65920320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 65920320 is about 8119.1329586354. The cubic root of 65920320 is about 403.9613072769.

The spelling of 65920320 in words is "sixty-five million, nine hundred twenty thousand, three hundred twenty".