2660686 has 16 divisors (see below), whose sum is σ = 4760064. Its totient is φ = 1090584.

The previous prime is 2660659. The next prime is 2660719. The reversal of 2660686 is 6860662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810 + ... + 4453.

It is an arithmetic number, because the mean of its divisors is an integer number (297504).

2^2660686 is an apocalyptic number.

2660686 is a deficient number, since it is larger than the sum of its proper divisors (2099378).

2660686 is a wasteful number, since it uses less digits than its factorization.

2660686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 2660686 is about 1631.1609362659. The cubic root of 2660686 is about 138.5685082056.

The spelling of 2660686 in words is "two million, six hundred sixty thousand, six hundred eighty-six".