2666020620 has 96 divisors (see below), whose sum is σ = 7804500480. Its totient is φ = 678712320.

The previous prime is 2666020619. The next prime is 2666020627. The reversal of 2666020620 is 260206662.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2666020627) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 852660 + ... + 855780.

It is an arithmetic number, because the mean of its divisors is an integer number (81296880).

Almost surely, 2^2666020620 is an apocalyptic number.

2666020620 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 2666020620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3902250240).

2666020620 is an abundant number, since it is smaller than the sum of its proper divisors (5138479860).

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

2666020620 is a wasteful number, since it uses less digits than its factorization.

2666020620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775 (or 3773 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 2666020620 is about 51633.5222505690. The cubic root of 2666020620 is about 1386.6105537215.

The spelling of 2666020620 in words is "two billion, six hundred sixty-six million, twenty thousand, six hundred twenty".