65705420 has 72 divisors (see below), whose sum is σ = 159759600. Its totient is φ = 22619520.

The previous prime is 65705417. The next prime is 65705443. The reversal of 65705420 is 2450756.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45266 + ... + 46694.

Almost surely, 2^65705420 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 65705420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79879800).

65705420 is an abundant number, since it is smaller than the sum of its proper divisors (94054180).

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

65705420 is a wasteful number, since it uses less digits than its factorization.

65705420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 65705420 is about 8105.8879834353. The cubic root of 65705420 is about 403.5218586063.

The spelling of 65705420 in words is "sixty-five million, seven hundred five thousand, four hundred twenty".