65206075680 has 336 divisors, whose sum is σ = 243132865920. Its totient is φ = 16472553984.

The previous prime is 65206075673. The next prime is 65206075729. The reversal of 65206075680 is 8657060256.

65206075680 is a `hidden beast` number, since 6 + 5 + 20 + 60 + 7 + 568 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2201449 + ... + 2230871.

It is an arithmetic number, because the mean of its divisors is an integer number (723609720).

Almost surely, 2^65206075680 is an apocalyptic number.

65206075680 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 65206075680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121566432960).

65206075680 is an abundant number, since it is smaller than the sum of its proper divisors (177926790240).

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

65206075680 is a wasteful number, since it uses less digits than its factorization.

65206075680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29475 (or 29452 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 65206075680 in words is "sixty-five billion, two hundred six million, seventy-five thousand, six hundred eighty".