65705808 has 80 divisors (see below), whose sum is σ = 194955776. Its totient is φ = 18679680.

The previous prime is 65705807. The next prime is 65705837. The reversal of 65705808 is 80850756.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65705803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94743 + ... + 95433.

Almost surely, 2^65705808 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 65705808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97477888).

65705808 is an abundant number, since it is smaller than the sum of its proper divisors (129249968).

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

65705808 is a wasteful number, since it uses less digits than its factorization.

65705808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 65705808 is about 8105.9119166199. The cubic root of 65705808 is about 403.5226528897.

The spelling of 65705808 in words is "sixty-five million, seven hundred five thousand, eight hundred eight".