2166860407 has 8 divisors (see below), whose sum is σ = 2176548192. Its totient is φ = 2157187200.

The previous prime is 2166860401. The next prime is 2166860441. The reversal of 2166860407 is 7040686612.

2166860407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166860407 - 2¹⁹ = 2166336119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166860407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166860401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381307 + ... + 386947.

It is an arithmetic number, because the mean of its divisors is an integer number (272068524).

Almost surely, 2^2166860407 is an apocalyptic number.

2166860407 is a deficient number, since it is larger than the sum of its proper divisors (9687785).

2166860407 is a wasteful number, since it uses less digits than its factorization.

2166860407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7289.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 2166860407 is about 46549.5478710589. The cubic root of 2166860407 is about 1294.0279138717.

The spelling of 2166860407 in words is "two billion, one hundred sixty-six million, eight hundred sixty thousand, four hundred seven".