6670478786 has 8 divisors (see below), whose sum is σ = 10072871100. Its totient is φ = 3312855088.

The previous prime is 6670478783. The next prime is 6670478809. The reversal of 6670478786 is 6878740766.

It can be written as a sum of positive squares in 2 ways, for example, as 5839252225 + 831226561 = 76415^2 + 28831^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6670478783) 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, 11191781 + ... + 11192376.

Almost surely, 2^6670478786 is an apocalyptic number.

6670478786 is a deficient number, since it is larger than the sum of its proper divisors (3402392314).

6670478786 is a wasteful number, since it uses less digits than its factorization.

6670478786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22384308.

The product of its (nonzero) digits is 18966528, while the sum is 59.

The square root of 6670478786 is about 81672.9991245577. Note that the first 3 decimals coincide. The cubic root of 6670478786 is about 1882.4307235708.

The spelling of 6670478786 in words is "six billion, six hundred seventy million, four hundred seventy-eight thousand, seven hundred eighty-six".