2066326878 has 128 divisors (see below), whose sum is σ = 5253341184. Its totient is φ = 526320000.

The previous prime is 2066326861. The next prime is 2066326891. The reversal of 2066326878 is 8786236602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8232253 + ... + 8232503.

It is an arithmetic number, because the mean of its divisors is an integer number (41041728).

Almost surely, 2^2066326878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2066326878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2626670592).

2066326878 is an abundant number, since it is smaller than the sum of its proper divisors (3187014306).

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

2066326878 is a wasteful number, since it uses less digits than its factorization.

2066326878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 2066326878 is about 45456.8683259197. The cubic root of 2066326878 is about 1273.6976326838.

The spelling of 2066326878 in words is "two billion, sixty-six million, three hundred twenty-six thousand, eight hundred seventy-eight".