2066556 has 12 divisors (see below), whose sum is σ = 4821992. Its totient is φ = 688848.

The previous prime is 2066551. The next prime is 2066563. The reversal of 2066556 is 6556602.

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

It is a super-2 number, since 2×2066556² = 8541307402272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066551) 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, 86095 + ... + 86118.

2^2066556 is an apocalyptic number.

It is an amenable number.

2066556 is an abundant number, since it is smaller than the sum of its proper divisors (2755436).

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

2066556 is a wasteful number, since it uses less digits than its factorization.

2066556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172220 (or 172218 counting only the distinct ones).

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

The square root of 2066556 is about 1437.5520860129. The cubic root of 2066556 is about 127.3744708385.

The spelling of 2066556 in words is "two million, sixty-six thousand, five hundred fifty-six".