6660918477600 has 288 divisors, whose sum is σ = 22639095005184. Its totient is φ = 1697879884800.

The previous prime is 6660918477589. The next prime is 6660918477641. The reversal of 6660918477600 is 67748190666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 47 ways as a sum of consecutive naturals, for example, 84029985 + ... + 84109215.

It is an arithmetic number, because the mean of its divisors is an integer number (78607968768).

Almost surely, 2^{6660918477600} is an apocalyptic number.

6660918477600 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 6660918477600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11319547502592).

6660918477600 is an abundant number, since it is smaller than the sum of its proper divisors (15978176527584).

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

6660918477600 is a wasteful number, since it uses less digits than its factorization.

6660918477600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80800 (or 80787 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 6660918477600 in words is "six trillion, six hundred sixty billion, nine hundred eighteen million, four hundred seventy-seven thousand, six hundred".