65642864 has 40 divisors (see below), whose sum is σ = 145809120. Its totient is φ = 28044288.

The previous prime is 65642809. The next prime is 65642867. The reversal of 65642864 is 46824656.

65642864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65642867) 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, 45092 + ... + 46524.

It is an arithmetic number, because the mean of its divisors is an integer number (3645228).

Almost surely, 2^65642864 is an apocalyptic number.

It is an amenable number.

65642864 is an abundant number, since it is smaller than the sum of its proper divisors (80166256).

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

65642864 is a wasteful number, since it uses less digits than its factorization.

65642864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1851 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 65642864 is about 8102.0283880026. The cubic root of 65642864 is about 403.3937579181.

The spelling of 65642864 in words is "sixty-five million, six hundred forty-two thousand, eight hundred sixty-four".