68801664 has 64 divisors (see below), whose sum is σ = 184212000. Its totient is φ = 22751232.

The previous prime is 68801651. The next prime is 68801713. The reversal of 68801664 is 46610886.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52732 + ... + 54020.

Almost surely, 2^68801664 is an apocalyptic number.

68801664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68801664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92106000).

68801664 is an abundant number, since it is smaller than the sum of its proper divisors (115410336).

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

68801664 is a wasteful number, since it uses less digits than its factorization.

68801664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68801664 is about 8294.6768472316. The cubic root of 68801664 is about 409.7632263679.

The spelling of 68801664 in words is "sixty-eight million, eight hundred one thousand, six hundred sixty-four".