6666783 has 8 divisors (see below), whose sum is σ = 8926896. Its totient is φ = 4425600.

The previous prime is 6666769. The next prime is 6666791. The reversal of 6666783 is 3876666.

6666783 is digitally balanced in base 3, 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 not a de Polignac number, because 6666783 - 2⁶ = 6666719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666383) 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, 3888 + ... + 5333.

It is an arithmetic number, because the mean of its divisors is an integer number (1115862).

Almost surely, 2^6666783 is an apocalyptic number.

6666783 is a deficient number, since it is larger than the sum of its proper divisors (2260113).

6666783 is a wasteful number, since it uses less digits than its factorization.

6666783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9465.

The product of its digits is 217728, while the sum is 42.

The square root of 6666783 is about 2582.0114252265. The cubic root of 6666783 is about 188.2083005084.

The spelling of 6666783 in words is "six million, six hundred sixty-six thousand, seven hundred eighty-three".