2166061511705 has 16 divisors (see below), whose sum is σ = 3199106233344. Its totient is φ = 1371045528000.

The previous prime is 2166061511693. The next prime is 2166061511827. The reversal of 2166061511705 is 5071151606612.

It is not a de Polignac number, because 2166061511705 - 2⁶ = 2166061511641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2380286921 + ... + 2380287830.

It is an arithmetic number, because the mean of its divisors is an integer number (199944139584).

Almost surely, 2^{2166061511705} is an apocalyptic number.

It is an amenable number.

2166061511705 is a deficient number, since it is larger than the sum of its proper divisors (1033044721639).

2166061511705 is a wasteful number, since it uses less digits than its factorization.

2166061511705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760574776.

The product of its (nonzero) digits is 75600, while the sum is 41.

The spelling of 2166061511705 in words is "two trillion, one hundred sixty-six billion, sixty-one million, five hundred eleven thousand, seven hundred five".