65308880 has 80 divisors (see below), whose sum is σ = 186904704. Its totient is φ = 20666880.

The previous prime is 65308843. The next prime is 65308889. The reversal of 65308880 is 8880356.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65308889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2795 + ... + 11765.

Almost surely, 2^65308880 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 65308880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93452352).

65308880 is an abundant number, since it is smaller than the sum of its proper divisors (121595824).

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

65308880 is a wasteful number, since it uses less digits than its factorization.

65308880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004 (or 8998 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 65308880 is about 8081.3909693814. The cubic root of 65308880 is about 402.7084526513.

The spelling of 65308880 in words is "sixty-five million, three hundred eight thousand, eight hundred eighty".