6686191546650 has 1152 divisors, whose sum is σ = 23636387174400. Its totient is φ = 1365023923200.

The previous prime is 6686191546621. The next prime is 6686191546651. The reversal of 6686191546650 is 566451916866.

6686191546650 is a `hidden beast` number, since 6 + 6 + 8 + 619 + 1 + 5 + 4 + 6 + 6 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (6686191546651) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 17641666161 + ... + 17641666539.

It is an arithmetic number, because the mean of its divisors is an integer number (20517697200).

Almost surely, 2^{6686191546650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6686191546650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11818193587200).

6686191546650 is an abundant number, since it is smaller than the sum of its proper divisors (16950195627750).

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

6686191546650 is a wasteful number, since it uses less digits than its factorization.

6686191546650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 55987200, while the sum is 63.

The spelling of 6686191546650 in words is "six trillion, six hundred eighty-six billion, one hundred ninety-one million, five hundred forty-six thousand, six hundred fifty".