65565420 has 24 divisors (see below), whose sum is σ = 183583344. Its totient is φ = 17484096.

The previous prime is 65565407. The next prime is 65565439. The reversal of 65565420 is 2456556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546319 + ... + 546438.

It is an arithmetic number, because the mean of its divisors is an integer number (7649306).

Almost surely, 2^65565420 is an apocalyptic number.

65565420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65565420 is an abundant number, since it is smaller than the sum of its proper divisors (118017924).

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

65565420 is a wasteful number, since it uses less digits than its factorization.

65565420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092769 (or 1092767 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 65565420 is about 8097.2476805394. The cubic root of 65565420 is about 403.2350571448.

The spelling of 65565420 in words is "sixty-five million, five hundred sixty-five thousand, four hundred twenty".