64665536 has 28 divisors (see below), whose sum is σ = 138193272. Its totient is φ = 29845248.

The previous prime is 64665521. The next prime is 64665539. The reversal of 64665536 is 63556646.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 64665493 and 64665502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64665539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38030 + ... + 39693.

It is an arithmetic number, because the mean of its divisors is an integer number (4935474).

Almost surely, 2^64665536 is an apocalyptic number.

It is an amenable number.

64665536 is an abundant number, since it is smaller than the sum of its proper divisors (73527736).

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

64665536 is a wasteful number, since it uses less digits than its factorization.

64665536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77748 (or 77738 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 64665536 is about 8041.4884194408. The cubic root of 64665536 is about 401.3817547220.

The spelling of 64665536 in words is "sixty-four million, six hundred sixty-five thousand, five hundred thirty-six".