2666340 has 36 divisors (see below), whose sum is σ = 8088444. Its totient is φ = 710976.

The previous prime is 2666309. The next prime is 2666381. The reversal of 2666340 is 436662.

2666340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 1790244 = 936^2 + 1338^2 .

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7227 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (224679).

2^2666340 is an apocalyptic number.

2666340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666340 is an abundant number, since it is smaller than the sum of its proper divisors (5422104).

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

2666340 is a wasteful number, since it uses less digits than its factorization.

2666340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14828 (or 14823 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 2666340 is about 1632.8931379610. The cubic root of 2666340 is about 138.6665921885. Note that the first 3 decimals are identical.

It can be divided in two parts, 26 and 66340, that added together give a palindrome (66366).

The spelling of 2666340 in words is "two million, six hundred sixty-six thousand, three hundred forty".