6666766671 has 8 divisors (see below), whose sum is σ = 9129266224. Its totient is φ = 4324389120.

The previous prime is 6666766669. The next prime is 6666766681. The reversal of 6666766671 is 1766676666.

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

It is not a de Polignac number, because 6666766671 - 2¹ = 6666766669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666766621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30030370 + ... + 30030591.

It is an arithmetic number, because the mean of its divisors is an integer number (1141158278).

Almost surely, 2^6666766671 is an apocalyptic number.

6666766671 is a deficient number, since it is larger than the sum of its proper divisors (2462499553).

6666766671 is a wasteful number, since it uses less digits than its factorization.

6666766671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60061001.

The product of its digits is 13716864, while the sum is 57.

The square root of 6666766671 is about 81650.2704894479. The cubic root of 6666766671 is about 1882.0814684831.

The spelling of 6666766671 in words is "six billion, six hundred sixty-six million, seven hundred sixty-six thousand, six hundred seventy-one".