2660066520 has 128 divisors (see below), whose sum is σ = 8226662400. Its totient is φ = 687730176.

The previous prime is 2660066489. The next prime is 2660066527. The reversal of 2660066520 is 256600662.

2660066520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660066527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612597 + ... + 616923.

It is an arithmetic number, because the mean of its divisors is an integer number (64270800).

Almost surely, 2^2660066520 is an apocalyptic number.

2660066520 is a gapful number since it is divisible by the number (20) 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 2660066520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4113331200).

2660066520 is an abundant number, since it is smaller than the sum of its proper divisors (5566595880).

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

2660066520 is a wasteful number, since it uses less digits than its factorization.

2660066520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2660066520 is about 51575.8327126184. The cubic root of 2660066520 is about 1385.5775319954.

The spelling of 2660066520 in words is "two billion, six hundred sixty million, sixty-six thousand, five hundred twenty".