2666620 has 96 divisors (see below), whose sum is σ = 6967296. Its totient is φ = 844800.

The previous prime is 2666591. The next prime is 2666633. The reversal of 2666620 is 266662.

It is a super-2 number, since 2×2666620² = 14221724448800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86005 + ... + 86035.

It is an arithmetic number, because the mean of its divisors is an integer number (72576).

2^2666620 is an apocalyptic number.

2666620 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 2666620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3483648).

2666620 is an abundant number, since it is smaller than the sum of its proper divisors (4300676).

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

2666620 is a wasteful number, since it uses less digits than its factorization.

2666620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2666620 is about 1632.9788731028. The cubic root of 2666620 is about 138.6714459439.

It can be divided in two parts, 266 and 6620, that added together give a palindrome (6886).

The spelling of 2666620 in words is "two million, six hundred sixty-six thousand, six hundred twenty".