6871786666 has 8 divisors (see below), whose sum is σ = 10310907744. Its totient is φ = 3434817420.

The previous prime is 6871786657. The next prime is 6871786667. The reversal of 6871786666 is 6666871786.

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

It is a super-3 number, since 3×6871786666³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6871786667) 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, 529950 + ... + 542761.

It is an arithmetic number, because the mean of its divisors is an integer number (1288863468).

Almost surely, 2^6871786666 is an apocalyptic number.

6871786666 is a deficient number, since it is larger than the sum of its proper divisors (3439121078).

6871786666 is a wasteful number, since it uses less digits than its factorization.

6871786666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075916.

The product of its digits is 24385536, while the sum is 61.

The square root of 6871786666 is about 82896.2403610682. The cubic root of 6871786666 is about 1901.1799379973.

The spelling of 6871786666 in words is "six billion, eight hundred seventy-one million, seven hundred eighty-six thousand, six hundred sixty-six".