2112166566 has 24 divisors (see below), whose sum is σ = 4577469624. Its totient is φ = 703884960.

The previous prime is 2112166549. The next prime is 2112166583. The reversal of 2112166566 is 6656612112.

2112166566 is a `hidden beast` number, since 2 + 11 + 21 + 66 + 566 = 666.

It is an interprime number because it is at equal distance from previous prime (2112166549) and next prime (2112166583).

It is a super-2 number, since 2×2112166566² = 8922495205056464712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2112166566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78490 + ... + 101906.

It is an arithmetic number, because the mean of its divisors is an integer number (190727901).

Almost surely, 2^2112166566 is an apocalyptic number.

2112166566 is an abundant number, since it is smaller than the sum of its proper divisors (2465303058).

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

2112166566 is a wasteful number, since it uses less digits than its factorization.

2112166566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28436 (or 28433 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 2112166566 is about 45958.3133502525. The cubic root of 2112166566 is about 1283.0474600361.

Adding to 2112166566 its reverse (6656612112), we get a palindrome (8768778678).

The spelling of 2112166566 in words is "two billion, one hundred twelve million, one hundred sixty-six thousand, five hundred sixty-six".