2166566346 has 32 divisors (see below), whose sum is σ = 5502391680. Its totient is φ = 619018848.

The previous prime is 2166566327. The next prime is 2166566359. The reversal of 2166566346 is 6436656612.

2166566346 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 5 + 6 + 634 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2865451 + ... + 2866206.

It is an arithmetic number, because the mean of its divisors is an integer number (171949740).

Almost surely, 2^2166566346 is an apocalyptic number.

2166566346 is an abundant number, since it is smaller than the sum of its proper divisors (3335825334).

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

2166566346 is a wasteful number, since it uses less digits than its factorization.

2166566346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5731675 (or 5731669 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 2166566346 is about 46546.3891832653. The cubic root of 2166566346 is about 1293.9693744359.

The spelling of 2166566346 in words is "two billion, one hundred sixty-six million, five hundred sixty-six thousand, three hundred forty-six".