65784820080 has 320 divisors, whose sum is σ = 235159520256. Its totient is φ = 14902272000.

The previous prime is 65784820067. The next prime is 65784820111. The reversal of 65784820080 is 8002848756.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156258270 + ... + 156258690.

Almost surely, 2^65784820080 is an apocalyptic number.

65784820080 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 65784820080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117579760128).

65784820080 is an abundant number, since it is smaller than the sum of its proper divisors (169374700176).

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

65784820080 is a wasteful number, since it uses less digits than its factorization.

65784820080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The spelling of 65784820080 in words is "sixty-five billion, seven hundred eighty-four million, eight hundred twenty thousand, eighty".