68664672 has 120 divisors (see below), whose sum is σ = 205821000. Its totient is φ = 22450176.

The previous prime is 68664647. The next prime is 68664719. The reversal of 68664672 is 27646686.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 152704 + ... + 153152.

It is an arithmetic number, because the mean of its divisors is an integer number (1715175).

Almost surely, 2^68664672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68664672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102910500).

68664672 is an abundant number, since it is smaller than the sum of its proper divisors (137156328).

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

68664672 is a wasteful number, since it uses less digits than its factorization.

68664672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 513 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 68664672 is about 8286.4149063392. The cubic root of 68664672 is about 409.4910838134.

The spelling of 68664672 in words is "sixty-eight million, six hundred sixty-four thousand, six hundred seventy-two".