2600660 has 24 divisors (see below), whose sum is σ = 5783400. Its totient is φ = 978944.

The previous prime is 2600627. The next prime is 2600681. The reversal of 2600660 is 660062.

It can be written as a sum of positive squares in 4 ways, for example, as 85264 + 2515396 = 292^2 + 1586^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

2600660 is a modest number, since divided by 660 gives 260 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3485 + ... + 4164.

It is an arithmetic number, because the mean of its divisors is an integer number (240975).

2^2600660 is an apocalyptic number.

2600660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2600660 is an abundant number, since it is smaller than the sum of its proper divisors (3182740).

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

2600660 is a wasteful number, since it uses less digits than its factorization.

2600660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7675 (or 7673 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2600660 is about 1612.6561939856. The cubic root of 2600660 is about 137.5185209211.

The spelling of 2600660 in words is "two million, six hundred thousand, six hundred sixty".