64668044 has 36 divisors (see below), whose sum is σ = 134724744. Its totient is φ = 27066816.

The previous prime is 64668031. The next prime is 64668049. The reversal of 64668044 is 44086646.

64668044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64667989 and 64668007.

It is not an unprimeable number, because it can be changed into a prime (64668049) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4592 + ... + 12264.

It is an arithmetic number, because the mean of its divisors is an integer number (3742354).

Almost surely, 2^64668044 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 64668044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67362372).

64668044 is an abundant number, since it is smaller than the sum of its proper divisors (70056700).

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

64668044 is a wasteful number, since it uses less digits than its factorization.

64668044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734 (or 7725 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 64668044 is about 8041.6443592091. The cubic root of 64668044 is about 401.3869437428.

The spelling of 64668044 in words is "sixty-four million, six hundred sixty-eight thousand, forty-four".