68485664 has 48 divisors (see below), whose sum is σ = 146126232. Its totient is φ = 31408128.

The previous prime is 68485663. The next prime is 68485667. The reversal of 68485664 is 46658486.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20322064 + 48163600 = 4508^2 + 6940^2 .

It is not an unprimeable number, because it can be changed into a prime (68485661) 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, 79862 + ... + 80714.

Almost surely, 2^68485664 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 68485664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73063116).

68485664 is an abundant number, since it is smaller than the sum of its proper divisors (77640568).

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

68485664 is a wasteful number, since it uses less digits than its factorization.

68485664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1061 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 68485664 is about 8275.6065638719. The cubic root of 68485664 is about 409.1349279741.

The spelling of 68485664 in words is "sixty-eight million, four hundred eighty-five thousand, six hundred sixty-four".