67564608 has 56 divisors (see below), whose sum is σ = 188183520. Its totient is φ = 21335040.

The previous prime is 67564603. The next prime is 67564619. The reversal of 67564608 is 80646576.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 67564608.

It is not an unprimeable number, because it can be changed into a prime (67564603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5613 + ... + 12908.

It is an arithmetic number, because the mean of its divisors is an integer number (3360420).

Almost surely, 2^67564608 is an apocalyptic number.

It is an amenable number.

67564608 is an abundant number, since it is smaller than the sum of its proper divisors (120618912).

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

67564608 is a wasteful number, since it uses less digits than its factorization.

67564608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18555 (or 18545 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 67564608 is about 8219.7693398294. The cubic root of 67564608 is about 407.2925070596.

The spelling of 67564608 in words is "sixty-seven million, five hundred sixty-four thousand, six hundred eight".