6666255963 has 36 divisors (see below), whose sum is σ = 10435696680. Its totient is φ = 4205175912.

The previous prime is 6666255961. The next prime is 6666255979. The reversal of 6666255963 is 3695526666.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 6666255963 - 2¹ = 6666255961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6666255961) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8060356 + ... + 8061182.

Almost surely, 2^6666255963 is an apocalyptic number.

6666255963 is a deficient number, since it is larger than the sum of its proper divisors (3769440717).

6666255963 is an frugal number, since it uses more digits than its factorization.

6666255963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 849 counting only the distinct ones).

The product of its digits is 10497600, while the sum is 54.

The square root of 6666255963 is about 81647.1430179893. The cubic root of 6666255963 is about 1882.0334082736.

The spelling of 6666255963 in words is "six billion, six hundred sixty-six million, two hundred fifty-five thousand, nine hundred sixty-three".