64688306 has 8 divisors (see below), whose sum is σ = 97145244. Its totient is φ = 32306560.

The previous prime is 64688303. The next prime is 64688329. The reversal of 64688306 is 60388646.

64688306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 64657681 + 30625 = 8041^2 + 175^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64688303) 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 3 ways as a sum of consecutive naturals, for example, 16595 + ... + 20118.

Almost surely, 2^64688306 is an apocalyptic number.

64688306 is a deficient number, since it is larger than the sum of its proper divisors (32456938).

64688306 is a wasteful number, since it uses less digits than its factorization.

64688306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37596.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 64688306 is about 8042.9040775083. The cubic root of 64688306 is about 401.4288606489.

The spelling of 64688306 in words is "sixty-four million, six hundred eighty-eight thousand, three hundred six".