2166400711 has 4 divisors (see below), whose sum is σ = 2166503400. Its totient is φ = 2166298024.

The previous prime is 2166400703. The next prime is 2166400723. The reversal of 2166400711 is 1170046612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2166400711 - 2³ = 2166400703 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 2166400711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166400741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6841 + ... + 66178.

It is an arithmetic number, because the mean of its divisors is an integer number (541625850).

Almost surely, 2^2166400711 is an apocalyptic number.

2166400711 is a deficient number, since it is larger than the sum of its proper divisors (102689).

2166400711 is an equidigital number, since it uses as much as digits as its factorization.

2166400711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102688.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2166400711 is about 46544.6099027589. The cubic root of 2166400711 is about 1293.9363987430.

The spelling of 2166400711 in words is "two billion, one hundred sixty-six million, four hundred thousand, seven hundred eleven".