65648080 has 80 divisors (see below), whose sum is σ = 159704064. Its totient is φ = 25067520.

The previous prime is 65648069. The next prime is 65648113. The reversal of 65648080 is 8084656.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 255312 + ... + 255568.

Almost surely, 2^65648080 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 65648080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79852032).

65648080 is an abundant number, since it is smaller than the sum of its proper divisors (94055984).

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

65648080 is a wasteful number, since it uses less digits than its factorization.

65648080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 65648080 is about 8102.3502763087. The cubic root of 65648080 is about 403.4044422281.

The spelling of 65648080 in words is "sixty-five million, six hundred forty-eight thousand, eighty".