6662706564673 has 4 divisors (see below), whose sum is σ = 7054630480260. Its totient is φ = 6270782649088.

The previous prime is 6662706564649. The next prime is 6662706564677. The reversal of 6662706564673 is 3764656072666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6212496430144 + 450210134529 = 2492488^2 + 670977^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662706564673 - 2¹⁷ = 6662706433601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6662706564677) 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, 195961957768 + ... + 195961957801.

It is an arithmetic number, because the mean of its divisors is an integer number (1763657620065).

Almost surely, 2^{6662706564673} is an apocalyptic number.

It is an amenable number.

6662706564673 is a deficient number, since it is larger than the sum of its proper divisors (391923915587).

6662706564673 is a wasteful number, since it uses less digits than its factorization.

6662706564673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391923915586.

The product of its (nonzero) digits is 274337280, while the sum is 64.

The spelling of 6662706564673 in words is "six trillion, six hundred sixty-two billion, seven hundred six million, five hundred sixty-four thousand, six hundred seventy-three".