6687007866 has 64 divisors (see below), whose sum is σ = 18526786560. Its totient is φ = 1736884080.

The previous prime is 6687007777. The next prime is 6687007867.

6687007866 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6687007867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 799956 + ... + 808271.

It is an arithmetic number, because the mean of its divisors is an integer number (289481040).

Almost surely, 2^6687007866 is an apocalyptic number.

6687007866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6687007866 is an abundant number, since it is smaller than the sum of its proper divisors (11839778694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6687007866 is a wasteful number, since it uses less digits than its factorization.

6687007866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608256 (or 1608250 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 6687007866 is about 81774.1271185453. The cubic root of 6687007866 is about 1883.9842943638.

The spelling of 6687007866 in words is "six billion, six hundred eighty-seven million, seven thousand, eight hundred sixty-six".