2166703385 has 32 divisors (see below), whose sum is σ = 3382566912. Its totient is φ = 1291942080.

The previous prime is 2166703373. The next prime is 2166703391. The reversal of 2166703385 is 5833076612.

It is not a de Polignac number, because 2166703385 - 2⁴ = 2166703369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113489 + ... + 131198.

It is an arithmetic number, because the mean of its divisors is an integer number (105705216).

Almost surely, 2^2166703385 is an apocalyptic number.

It is an amenable number.

2166703385 is a deficient number, since it is larger than the sum of its proper divisors (1215863527).

2166703385 is a wasteful number, since it uses less digits than its factorization.

2166703385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244733.

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 2166703385 is about 46547.8612290619. The cubic root of 2166703385 is about 1293.9966557807.

Adding to 2166703385 its reverse (5833076612), we get a palindrome (7999779997).

The spelling of 2166703385 in words is "two billion, one hundred sixty-six million, seven hundred three thousand, three hundred eighty-five".