65608638 has 8 divisors (see below), whose sum is σ = 131217288. Its totient is φ = 21869544.

The previous prime is 65608637. The next prime is 65608657. The reversal of 65608638 is 83680656.

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

65608638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 65608638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65608633) by changing a digit.

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, 5467381 + ... + 5467392.

It is an arithmetic number, because the mean of its divisors is an integer number (16402161).

Almost surely, 2^65608638 is an apocalyptic number.

65608638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

65608638 is a wasteful number, since it uses less digits than its factorization.

65608638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10934778.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 65608638 is about 8099.9159254896. The cubic root of 65608638 is about 403.3236362823.

The spelling of 65608638 in words is "sixty-five million, six hundred eight thousand, six hundred thirty-eight".