6601861868858 has 16 divisors (see below), whose sum is σ = 10075169348160. Its totient is φ = 3243713004576.

The previous prime is 6601861868851. The next prime is 6601861868893. The reversal of 6601861868858 is 8588681681066.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6601861868791 and 6601861868800.

It is not an unprimeable number, because it can be changed into a prime (6601861868851) 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, 60174566 + ... + 60284177.

It is an arithmetic number, because the mean of its divisors is an integer number (629698084260).

Almost surely, 2^{6601861868858} is an apocalyptic number.

6601861868858 is a deficient number, since it is larger than the sum of its proper divisors (3473307479302).

6601861868858 is a wasteful number, since it uses less digits than its factorization.

6601861868858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120459221.

The product of its (nonzero) digits is 212336640, while the sum is 71.

The spelling of 6601861868858 in words is "six trillion, six hundred one billion, eight hundred sixty-one million, eight hundred sixty-eight thousand, eight hundred fifty-eight".