2166685035 has 16 divisors (see below), whose sum is σ = 3560391456. Its totient is φ = 1124333568.

The previous prime is 2166685021. The next prime is 2166685069. The reversal of 2166685035 is 5305866612.

It is a happy number.

2166685035 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2166685035 - 2⁹ = 2166684523 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, 1951414 + ... + 1952523.

It is an arithmetic number, because the mean of its divisors is an integer number (222524466).

Almost surely, 2^2166685035 is an apocalyptic number.

2166685035 is a deficient number, since it is larger than the sum of its proper divisors (1393706421).

2166685035 is a wasteful number, since it uses less digits than its factorization.

2166685035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3903982.

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2166685035 is about 46547.6641196956. The cubic root of 2166685035 is about 1293.9930027802.

The spelling of 2166685035 in words is "two billion, one hundred sixty-six million, six hundred eighty-five thousand, thirty-five".