2660220 has 36 divisors (see below), whose sum is σ = 8069880. Its totient is φ = 709344.

The previous prime is 2660219. The next prime is 2660237. The reversal of 2660220 is 220662.

2660220 is a `hidden beast` number, since 2 + 660 + 2 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2660193 and 2660202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7210 + ... + 7569.

2^2660220 is an apocalyptic number.

2660220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660220 is an abundant number, since it is smaller than the sum of its proper divisors (5409660).

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

2660220 is a wasteful number, since it uses less digits than its factorization.

2660220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14794 (or 14789 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2660220 is about 1631.0180869629. The cubic root of 2660220 is about 138.5604179744.

Adding to 2660220 its reverse (220662), we get a palindrome (2880882).

The spelling of 2660220 in words is "two million, six hundred sixty thousand, two hundred twenty".