1000166556 has 12 divisors (see below), whose sum is σ = 2333721992. Its totient is φ = 333388848.

The previous prime is 1000166543. The next prime is 1000166591. The reversal of 1000166556 is 6556610001.

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

It is a super-2 number, since 2×1000166556² = 2000666279481802272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41673595 + ... + 41673618.

Almost surely, 2^1000166556 is an apocalyptic number.

It is an amenable number.

1000166556 is an abundant number, since it is smaller than the sum of its proper divisors (1333555436).

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

1000166556 is a wasteful number, since it uses less digits than its factorization.

1000166556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83347220 (or 83347218 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1000166556 is about 31625.4099736272. The cubic root of 1000166556 is about 1000.0555155846.

Adding to 1000166556 its reverse (6556610001), we get a palindrome (7556776557).

The spelling of 1000166556 in words is "one billion, one hundred sixty-six thousand, five hundred fifty-six".