2666403020 has 48 divisors (see below), whose sum is σ = 5821750368. Its totient is φ = 1024995840.

The previous prime is 2666402993. The next prime is 2666403043. The reversal of 2666403020 is 203046662.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30674 + ... + 79206.

It is an arithmetic number, because the mean of its divisors is an integer number (121286466).

Almost surely, 2^2666403020 is an apocalyptic number.

2666403020 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 2666403020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2910875184).

2666403020 is an abundant number, since it is smaller than the sum of its proper divisors (3155347348).

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

2666403020 is a wasteful number, since it uses less digits than its factorization.

2666403020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48650 (or 48648 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2666403020 is about 51637.2251384599. The cubic root of 2666403020 is about 1386.6768465979.

Adding to 2666403020 its reverse (203046662), we get a palindrome (2869449682).

The spelling of 2666403020 in words is "two billion, six hundred sixty-six million, four hundred three thousand, twenty".