6666727797 has 12 divisors (see below), whose sum is σ = 9864589644. Its totient is φ = 4336082880.

The previous prime is 6666727789. The next prime is 6666727807. The reversal of 6666727797 is 7977276666.

It can be written as a sum of positive squares in 2 ways, for example, as 2711701476 + 3955026321 = 52074^2 + 62889^2 .

It is not a de Polignac number, because 6666727797 - 2³ = 6666727789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666727757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9033138 + ... + 9033875.

It is an arithmetic number, because the mean of its divisors is an integer number (822049137).

Almost surely, 2^6666727797 is an apocalyptic number.

It is an amenable number.

6666727797 is a deficient number, since it is larger than the sum of its proper divisors (3197861847).

6666727797 is a wasteful number, since it uses less digits than its factorization.

6666727797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18067060 (or 18067057 counting only the distinct ones).

The product of its digits is 56010528, while the sum is 63.

The square root of 6666727797 is about 81650.0324372256. The cubic root of 6666727797 is about 1882.0778103291.

The spelling of 6666727797 in words is "six billion, six hundred sixty-six million, seven hundred twenty-seven thousand, seven hundred ninety-seven".