6660845706240 has 1232 divisors, whose sum is σ = 26636027047776. Its totient is φ = 1583765913600.

The previous prime is 6660845706227. The next prime is 6660845706259. The reversal of 6660845706240 is 426075480666.

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

It is a congruent number.

It is an unprimeable number.

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 111 ways as a sum of consecutive naturals, for example, 2176034310 + ... + 2176037370.

Almost surely, 2^{6660845706240} is an apocalyptic number.

6660845706240 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 6660845706240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13318013523888).

6660845706240 is an abundant number, since it is smaller than the sum of its proper divisors (19975181341536).

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

6660845706240 is a wasteful number, since it uses less digits than its factorization.

6660845706240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168 (or 3135 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 6660845706240 in words is "six trillion, six hundred sixty billion, eight hundred forty-five million, seven hundred six thousand, two hundred forty".