2661020 has 12 divisors (see below), whose sum is σ = 5588184. Its totient is φ = 1064400.

The previous prime is 2661013. The next prime is 2661067. The reversal of 2661020 is 201662.

It is a self number, because there is not a number n which added to its sum of digits gives 2661020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66506 + ... + 66545.

It is an arithmetic number, because the mean of its divisors is an integer number (465682).

2^2661020 is an apocalyptic number.

2661020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661020 is an abundant number, since it is smaller than the sum of its proper divisors (2927164).

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

2661020 is a wasteful number, since it uses less digits than its factorization.

2661020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133060 (or 133058 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2661020 is about 1631.2633141219. The cubic root of 2661020 is about 138.5743062022.

Adding to 2661020 its reverse (201662), we get a palindrome (2862682).

The spelling of 2661020 in words is "two million, six hundred sixty-one thousand, twenty".