6666645861120 has 576 divisors, whose sum is σ = 25429123399680. Its totient is φ = 1456688185344.

The previous prime is 6666645861101. The next prime is 6666645861137. The reversal of 6666645861120 is 211685466666.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54263121 + ... + 54385839.

It is an arithmetic number, because the mean of its divisors is an integer number (44147783680).

Almost surely, 2^{6666645861120} is an apocalyptic number.

6666645861120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666645861120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12714561699840).

6666645861120 is an abundant number, since it is smaller than the sum of its proper divisors (18762477538560).

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

6666645861120 is a wasteful number, since it uses less digits than its factorization.

6666645861120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122840 (or 122826 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 6666645861120 in words is "six trillion, six hundred sixty-six billion, six hundred forty-five million, eight hundred sixty-one thousand, one hundred twenty".