65407820 has 24 divisors (see below), whose sum is σ = 137734800. Its totient is φ = 26091072.

The previous prime is 65407817. The next prime is 65407829. The reversal of 65407820 is 2870456.

65407820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (65407829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3266 + ... + 11894.

It is an arithmetic number, because the mean of its divisors is an integer number (5738950).

Almost surely, 2^65407820 is an apocalyptic number.

It is an amenable number.

65407820 is an abundant number, since it is smaller than the sum of its proper divisors (72326980).

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

65407820 is a wasteful number, since it uses less digits than its factorization.

65407820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9017 (or 9015 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 65407820 is about 8087.5101236413. The cubic root of 65407820 is about 402.9117117417.

The spelling of 65407820 in words is "sixty-five million, four hundred seven thousand, eight hundred twenty".