2166668395 has 8 divisors (see below), whose sum is σ = 2610362160. Its totient is φ = 1726428000.

The previous prime is 2166668389. The next prime is 2166668443. The reversal of 2166668395 is 5938666612.

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

It is a de Polignac number, because none of the positive numbers 2^k-2166668395 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861960 + ... + 864469.

It is an arithmetic number, because the mean of its divisors is an integer number (326295270).

Almost surely, 2^2166668395 is an apocalyptic number.

2166668395 is a deficient number, since it is larger than the sum of its proper divisors (443693765).

2166668395 is a wasteful number, since it uses less digits than its factorization.

2166668395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726685.

The product of its digits is 2799360, while the sum is 52.

The square root of 2166668395 is about 46547.4853778375. The cubic root of 2166668395 is about 1293.9896901777.

The spelling of 2166668395 in words is "two billion, one hundred sixty-six million, six hundred sixty-eight thousand, three hundred ninety-five".