2166640351156 has 12 divisors (see below), whose sum is σ = 3795914641792. Its totient is φ = 1082093310648.

The previous prime is 2166640351151. The next prime is 2166640351193. The reversal of 2166640351156 is 6511530466612.

It is a happy number.

It is a super-3 number, since 3×2166640351156³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166640351151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306712260 + ... + 306719323.

Almost surely, 2^{2166640351156} is an apocalyptic number.

It is an amenable number.

2166640351156 is a deficient number, since it is larger than the sum of its proper divisors (1629274290636).

2166640351156 is a wasteful number, since it uses less digits than its factorization.

2166640351156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613432470 (or 613432468 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 2166640351156 in words is "two trillion, one hundred sixty-six billion, six hundred forty million, three hundred fifty-one thousand, one hundred fifty-six".