65799888 has 160 divisors (see below), whose sum is σ = 223319040. Its totient is φ = 16174080.

The previous prime is 65799857. The next prime is 65799893. The reversal of 65799888 is 88899756.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69756 + ... + 70692.

It is an arithmetic number, because the mean of its divisors is an integer number (1395744).

Almost surely, 2^65799888 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 65799888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111659520).

65799888 is an abundant number, since it is smaller than the sum of its proper divisors (157519152).

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

65799888 is a wasteful number, since it uses less digits than its factorization.

65799888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 979 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The square root of 65799888 is about 8111.7130126749. The cubic root of 65799888 is about 403.7151539161.

The spelling of 65799888 in words is "sixty-five million, seven hundred ninety-nine thousand, eight hundred eighty-eight".