6699666783 has 16 divisors (see below), whose sum is σ = 9095596416. Its totient is φ = 4385353440.

The previous prime is 6699666769. The next prime is 6699666793. The reversal of 6699666783 is 3876669966.

It is a happy number.

6699666783 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6699666783 - 2⁹ = 6699666271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699666793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70516 + ... + 135542.

It is an arithmetic number, because the mean of its divisors is an integer number (568474776).

Almost surely, 2^6699666783 is an apocalyptic number.

6699666783 is a deficient number, since it is larger than the sum of its proper divisors (2395929633).

6699666783 is a wasteful number, since it uses less digits than its factorization.

6699666783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65654.

The product of its digits is 105815808, while the sum is 66.

The square root of 6699666783 is about 81851.4922466292. The cubic root of 6699666783 is about 1885.1723776721.

The spelling of 6699666783 in words is "six billion, six hundred ninety-nine million, six hundred sixty-six thousand, seven hundred eighty-three".