68057664 has 112 divisors (see below), whose sum is σ = 197510400. Its totient is φ = 20586496.

The previous prime is 68057657. The next prime is 68057699. The reversal of 68057664 is 46675086.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94297 + ... + 95015.

Almost surely, 2^68057664 is an apocalyptic number.

68057664 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 68057664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98755200).

68057664 is an abundant number, since it is smaller than the sum of its proper divisors (129452736).

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

68057664 is a wasteful number, since it uses less digits than its factorization.

68057664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 770 counting only the distinct ones).

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

The square root of 68057664 is about 8249.7069038845. The cubic root of 68057664 is about 408.2808523787.

The spelling of 68057664 in words is "sixty-eight million, fifty-seven thousand, six hundred sixty-four".