65625578 has 8 divisors (see below), whose sum is σ = 102718368. Its totient is φ = 31386124.

The previous prime is 65625557. The next prime is 65625643. The reversal of 65625578 is 87552656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713276 + ... + 713367.

It is an arithmetic number, because the mean of its divisors is an integer number (12839796).

Almost surely, 2^65625578 is an apocalyptic number.

65625578 is a deficient number, since it is larger than the sum of its proper divisors (37092790).

65625578 is a wasteful number, since it uses less digits than its factorization.

65625578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426668.

The product of its digits is 504000, while the sum is 44.

The square root of 65625578 is about 8100.9615478658. The cubic root of 65625578 is about 403.3583457081.

The spelling of 65625578 in words is "sixty-five million, six hundred twenty-five thousand, five hundred seventy-eight".