2660556 has 12 divisors (see below), whose sum is σ = 6207992. Its totient is φ = 886848.

The previous prime is 2660533. The next prime is 2660557. The reversal of 2660556 is 6550662.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2660557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110845 + ... + 110868.

2^2660556 is an apocalyptic number.

It is an amenable number.

2660556 is an abundant number, since it is smaller than the sum of its proper divisors (3547436).

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

2660556 is a wasteful number, since it uses less digits than its factorization.

2660556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221720 (or 221718 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2660556 is about 1631.1210868602. The cubic root of 2660556 is about 138.5662513692.

The spelling of 2660556 in words is "two million, six hundred sixty thousand, five hundred fifty-six".