2587666 has 8 divisors (see below), whose sum is σ = 3936384. Its totient is φ = 1275540.

The previous prime is 2587649. The next prime is 2587693. The reversal of 2587666 is 6667852.

2587666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2¹⁷ + 5⁷ + 8⁷ + 7² + 6² + 6⁴ + 6⁷ .

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 3 ways as a sum of consecutive naturals, for example, 8970 + ... + 9253.

It is an arithmetic number, because the mean of its divisors is an integer number (492048).

2^2587666 is an apocalyptic number.

2587666 is a deficient number, since it is larger than the sum of its proper divisors (1348718).

2587666 is a wasteful number, since it uses less digits than its factorization.

2587666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18296.

The product of its digits is 120960, while the sum is 40.

The square root of 2587666 is about 1608.6223919864. The cubic root of 2587666 is about 137.2891047970.

The spelling of 2587666 in words is "two million, five hundred eighty-seven thousand, six hundred sixty-six".